drm/scheduler: fix function name prefix in comments

That got missed while moving the files outside of amdgpu.
Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/scheduler/sched_fence.c

@@ -87,7 +87,7 @@ static bool drm_sched_fence_enable_signaling(struct dma_fence *f)
 }
 
 /**
- * amd_sched_fence_free - free up the fence memory
+ * drm_sched_fence_free - free up the fence memory
  *
  * @rcu: RCU callback head
  *
@@ -103,7 +103,7 @@ static void drm_sched_fence_free(struct rcu_head *rcu)
 }
 
 /**
- * amd_sched_fence_release_scheduled - callback that fence can be freed
+ * drm_sched_fence_release_scheduled - callback that fence can be freed
  *
  * @fence: fence
  *
@@ -118,7 +118,7 @@ static void drm_sched_fence_release_scheduled(struct dma_fence *f)
 }
 
 /**
- * amd_sched_fence_release_finished - drop extra reference
+ * drm_sched_fence_release_finished - drop extra reference
  *
  * @f: fence
  *