drm/ttm: use bit flag to replace allow_reserved_eviction in ttm_operation_ctx

for saving memory and more bit flag can be used in future

Signed-off-by: Roger He <Hongbo.He@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 2cd025c..872ff6c 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -263,8 +263,8 @@ struct ttm_bo_kmap_obj {
  *
  * @interruptible: Sleep interruptible if sleeping.
  * @no_wait_gpu: Return immediately if the GPU is busy.
- * @allow_reserved_eviction: Allow eviction of reserved BOs.
  * @resv: Reservation object to allow reserved evictions with.
+ * @flags: Including the following flags
  *
  * Context for TTM operations like changing buffer placement or general memory
  * allocation.
@@ -272,11 +272,14 @@ struct ttm_bo_kmap_obj {
 struct ttm_operation_ctx {
 	bool interruptible;
 	bool no_wait_gpu;
-	bool allow_reserved_eviction;
 	struct reservation_object *resv;
 	uint64_t bytes_moved;
+	uint32_t flags;
 };
 
+/* Allow eviction of reserved BOs */
+#define TTM_OPT_FLAG_ALLOW_RES_EVICT	0x1
+
 /**
  * ttm_bo_reference - reference a struct ttm_buffer_object
  *