drm/radeon/kms: add cayman specific fence_ring_emit

cayman is wb only and doesn't have a VC.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <deathsimple@vodafone.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 558933c..8493d40 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -966,17 +966,17 @@
 	.ring = {
 		[RADEON_RING_TYPE_GFX_INDEX] = {
 			.ib_execute = &evergreen_ring_ib_execute,
-			.emit_fence = &r600_fence_ring_emit,
+			.emit_fence = &cayman_fence_ring_emit,
 			.emit_semaphore = &r600_semaphore_ring_emit,
 		},
 		[CAYMAN_RING_TYPE_CP1_INDEX] = {
 			.ib_execute = &r600_ring_ib_execute,
-			.emit_fence = &r600_fence_ring_emit,
+			.emit_fence = &cayman_fence_ring_emit,
 			.emit_semaphore = &r600_semaphore_ring_emit,
 		},
 		[CAYMAN_RING_TYPE_CP2_INDEX] = {
 			.ib_execute = &r600_ring_ib_execute,
-			.emit_fence = &r600_fence_ring_emit,
+			.emit_fence = &cayman_fence_ring_emit,
 			.emit_semaphore = &r600_semaphore_ring_emit,
 		}
 	},