drm/radeon: rework fallback handling v2

Let the CS module decide if we can fall back to VRAM or not.

v2: remove unintended change

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.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 730d335..3db6b02 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -358,8 +358,9 @@
 	struct ttm_validate_buffer tv;
 	struct radeon_bo	*bo;
 	uint64_t		gpu_offset;
-	unsigned		rdomain;
-	unsigned		wdomain;
+	bool			written;
+	unsigned		domain;
+	unsigned		alt_domain;
 	u32			tiling_flags;
 };