drm/radeon: add driver option to disable vce block.

Quite few suspend/hibernation bugs are related to this block. Add
an option to disable those as a work around.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 1b26cef..91828ec 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -114,6 +114,7 @@
 extern int radeon_auxch;
 extern int radeon_mst;
 extern int radeon_uvd;
+extern int radeon_vce;
 
 /*
  * Copy from radeon_drv.h so we don't have to include both and have conflicting