drm/nouveau/ce: namespace + nvidia gpu names (no binary change)

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 342305f..dfc9e54 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c
@@ -88,11 +88,11 @@
 		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;
+		device->oclass[NVDEV_ENGINE_CE0    ] = &gk104_ce0_oclass;
 #if 0
-		device->oclass[NVDEV_ENGINE_CE1    ] = &nve0_ce1_oclass;
+		device->oclass[NVDEV_ENGINE_CE1    ] = &gk104_ce1_oclass;
 #endif
-		device->oclass[NVDEV_ENGINE_CE2    ] = &nve0_ce2_oclass;
+		device->oclass[NVDEV_ENGINE_CE2    ] = &gk104_ce2_oclass;
 #if 0
 		device->oclass[NVDEV_ENGINE_MSVLD  ] = &nve0_msvld_oclass;
 		device->oclass[NVDEV_ENGINE_MSPDEC ] = &nve0_mspdec_oclass;