drm/radeon: remove useless return

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/uvd_v2_2.c

@@ -57,7 +57,6 @@ void uvd_v2_2_fence_emit(struct radeon_device *rdev,
 	radeon_ring_write(ring, 0);
 	radeon_ring_write(ring, PACKET0(UVD_GPCOM_VCPU_CMD, 0));
 	radeon_ring_write(ring, 2);
-	return;
 }
 
 /**