drm/nouveau: drop DRIVER_PCI_DMA and DRIVER_SG

The former doesn't do anything without DRIVER_HAVE_DMA (which is
force-disabled for kms drivers anyway). The latter isn't used by the
(kms) nouveau ddx.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -675,7 +675,7 @@ nouveau_driver_fops = {
 static struct drm_driver
 driver = {
 	.driver_features =
-		DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_SG |
+		DRIVER_USE_AGP |
 		DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
 
 	.load = nouveau_drm_load,