Merge branch 'drm-next-5.1' of git://people.freedesktop.org/~agd5f/linux into drm-next

ttm:
- Replace ref/unref naming with get/put

amdgpu:
- Revert DC clang fix, causes a segfault with some compiler versions
- SR-IOV fix
- PCIE fix for vega20
- Misc DC fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190201062345.7304-1-alexander.deucher@amd.com

drivers/gpu/drm/ast/ast_main.c

@@ -639,13 +639,9 @@ int ast_dumb_create(struct drm_file *file,
 
 static void ast_bo_unref(struct ast_bo **bo)
 {
-	struct ttm_buffer_object *tbo;
-
 	if ((*bo) == NULL)
 		return;
-
-	tbo = &((*bo)->bo);
-	ttm_bo_unref(&tbo);
+	ttm_bo_put(&((*bo)->bo));
 	*bo = NULL;
 }