drm/nouveau/sw: rename from software (no binary change)

Shorter device name, make consistent with our engine enums.

The namespace of NVKM is being changed to nvkm_ instead of nouveau_,
which will be used for the DRM part of the driver.  This is being
done in order to make it very clear as to what part of the driver a
given symbol belongs to, and as a minor step towards splitting the
DRM driver out to be able to stand on its own (for virt).

Because there's already a large amount of churn here anyway, this is
as good a time as any to also switch to NVIDIA's device and chipset
naming to ease collaboration with them.

A comparison of objdump disassemblies proves no code changes.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c
index 6902505..55e4633 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c
@@ -45,7 +45,7 @@
 #include <engine/device.h>
 #include <engine/dmaobj.h>
 #include <engine/fifo.h>
-#include <engine/software.h>
+#include <engine/sw.h>
 #include <engine/gr.h>
 #include <engine/disp.h>
 #include <engine/ce.h>
@@ -85,7 +85,7 @@
 #endif
 		device->oclass[NVDEV_ENGINE_DMAOBJ ] =  nvd0_dmaeng_oclass;
 		device->oclass[NVDEV_ENGINE_FIFO   ] =  nv108_fifo_oclass;
-		device->oclass[NVDEV_ENGINE_SW     ] =  nvc0_software_oclass;
+		device->oclass[NVDEV_ENGINE_SW     ] =  nvc0_sw_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] =  gm107_gr_oclass;
 		device->oclass[NVDEV_ENGINE_DISP   ] =  gm107_disp_oclass;
 		device->oclass[NVDEV_ENGINE_CE0    ] = &nve0_ce0_oclass;
@@ -129,7 +129,7 @@
 		device->oclass[NVDEV_ENGINE_DMAOBJ ] =  nvd0_dmaeng_oclass;
 #if 0
 		device->oclass[NVDEV_ENGINE_FIFO   ] =  nv108_fifo_oclass;
-		device->oclass[NVDEV_ENGINE_SW     ] =  nvc0_software_oclass;
+		device->oclass[NVDEV_ENGINE_SW     ] =  nvc0_sw_oclass;
 		device->oclass[NVDEV_ENGINE_GR     ] =  gm107_gr_oclass;
 #endif
 		device->oclass[NVDEV_ENGINE_DISP   ] =  gm204_disp_oclass;