drm/radeon: use CP DMA on r6xx for bo moves

Lighter weight than using the 3D engine.
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_asic.c

@@ -1026,7 +1026,7 @@ static struct radeon_asic r600_asic = {
 		.blit_ring_index = RADEON_RING_TYPE_GFX_INDEX,
 		.dma = &r600_copy_dma,
 		.dma_ring_index = R600_RING_TYPE_DMA_INDEX,
-		.copy = &r600_copy_blit,
+		.copy = &r600_copy_cpdma,
 		.copy_ring_index = RADEON_RING_TYPE_GFX_INDEX,
 	},
 	.surface = {
@@ -1119,7 +1119,7 @@ static struct radeon_asic rv6xx_asic = {
 		.blit_ring_index = RADEON_RING_TYPE_GFX_INDEX,
 		.dma = &r600_copy_dma,
 		.dma_ring_index = R600_RING_TYPE_DMA_INDEX,
-		.copy = &r600_copy_blit,
+		.copy = &r600_copy_cpdma,
 		.copy_ring_index = RADEON_RING_TYPE_GFX_INDEX,
 	},
 	.surface = {
@@ -1229,7 +1229,7 @@ static struct radeon_asic rs780_asic = {
 		.blit_ring_index = RADEON_RING_TYPE_GFX_INDEX,
 		.dma = &r600_copy_dma,
 		.dma_ring_index = R600_RING_TYPE_DMA_INDEX,
-		.copy = &r600_copy_blit,
+		.copy = &r600_copy_cpdma,
 		.copy_ring_index = RADEON_RING_TYPE_GFX_INDEX,
 	},
 	.surface = {