drm/nv44/mpeg: create a copy of the nv31/nv40 impls

The nv31/nv40 impls are actually fairly nv44-specific, since they assume
the presence of the instance register/context switching. Create a copy
before nv31/nv40 get fixed.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/core/engine/device/nv40.c b/drivers/gpu/drm/nouveau/core/engine/device/nv40.c
index 0f32251..c0d7943 100644
--- a/drivers/gpu/drm/nouveau/core/engine/device/nv40.c
+++ b/drivers/gpu/drm/nouveau/core/engine/device/nv40.c
@@ -150,7 +150,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x47:
@@ -171,7 +171,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x49:
@@ -192,7 +192,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x4b:
@@ -213,7 +213,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x44:
@@ -234,7 +234,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x46:
@@ -255,7 +255,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x4a:
@@ -276,7 +276,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x4c:
@@ -297,7 +297,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x4e:
@@ -318,7 +318,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x63:
@@ -339,7 +339,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x67:
@@ -360,7 +360,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	case 0x68:
@@ -381,7 +381,7 @@
 		device->oclass[NVDEV_ENGINE_FIFO   ] = &nv40_fifo_oclass;
 		device->oclass[NVDEV_ENGINE_SW     ] =  nv10_software_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] = &nv40_graph_oclass;
-		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv40_mpeg_oclass;
+		device->oclass[NVDEV_ENGINE_MPEG   ] = &nv44_mpeg_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] = &nv04_disp_oclass;
 		break;
 	default: