drm/nouveau/bar: 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 915ba95..29dbe16 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/gm100.c
@@ -77,7 +77,7 @@
 		device->oclass[NVDEV_SUBDEV_IBUS   ] = &nve0_ibus_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
 		device->oclass[NVDEV_SUBDEV_MMU    ] = &nvc0_mmu_oclass;
-		device->oclass[NVDEV_SUBDEV_BAR    ] = &nvc0_bar_oclass;
+		device->oclass[NVDEV_SUBDEV_BAR    ] = &gf100_bar_oclass;
 		device->oclass[NVDEV_SUBDEV_PMU    ] =  nv108_pmu_oclass;
 
 #if 0
@@ -121,7 +121,7 @@
 		device->oclass[NVDEV_SUBDEV_IBUS   ] = &nve0_ibus_oclass;
 		device->oclass[NVDEV_SUBDEV_INSTMEM] =  nv50_instmem_oclass;
 		device->oclass[NVDEV_SUBDEV_MMU    ] = &nvc0_mmu_oclass;
-		device->oclass[NVDEV_SUBDEV_BAR    ] = &nvc0_bar_oclass;
+		device->oclass[NVDEV_SUBDEV_BAR    ] = &gf100_bar_oclass;
 		device->oclass[NVDEV_SUBDEV_PMU    ] =  nv108_pmu_oclass;
 #if 0
 		device->oclass[NVDEV_SUBDEV_VOLT   ] = &nv40_volt_oclass;