drm/radeon/kms: Avoid crash when trying to cleanup uninitialized structure

Add boolean to record if some part of the driver are initialized or
not this allow to avoid a crash when trying to cleanup uninitialized
structure members.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index cd650fd..53b5560 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -162,6 +162,7 @@
 	struct list_head		created;
 	struct list_head		emited;
 	struct list_head		signaled;
+	bool				initialized;
 };
 
 struct radeon_fence {
@@ -202,8 +203,9 @@
 struct radeon_mman {
 	struct ttm_bo_global_ref        bo_global_ref;
 	struct ttm_global_reference	mem_global_ref;
-	bool				mem_global_referenced;
 	struct ttm_bo_device		bdev;
+	bool				mem_global_referenced;
+	bool				initialized;
 };
 
 struct radeon_bo {