gpu: drm: scheduler: sched_entity: Demote non-conformant kernel-doc headers

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/scheduler/sched_entity.c:316: warning: Function parameter or member 'f' not described in 'drm_sched_entity_clear_dep'
 drivers/gpu/drm/scheduler/sched_entity.c:316: warning: Function parameter or member 'cb' not described in 'drm_sched_entity_clear_dep'
 drivers/gpu/drm/scheduler/sched_entity.c:330: warning: Function parameter or member 'f' not described in 'drm_sched_entity_wakeup'
 drivers/gpu/drm/scheduler/sched_entity.c:330: warning: Function parameter or member 'cb' not described in 'drm_sched_entity_wakeup'

Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Nirmoy Das <nirmoy.aiemd@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/scheduler/sched_entity.c

@@ -308,7 +308,7 @@ void drm_sched_entity_destroy(struct drm_sched_entity *entity)
 }
 EXPORT_SYMBOL(drm_sched_entity_destroy);
 
-/**
+/*
  * drm_sched_entity_clear_dep - callback to clear the entities dependency
  */
 static void drm_sched_entity_clear_dep(struct dma_fence *f,
@@ -321,7 +321,7 @@ static void drm_sched_entity_clear_dep(struct dma_fence *f,
 	dma_fence_put(f);
 }
 
-/**
+/*
  * drm_sched_entity_clear_dep - callback to clear the entities dependency and
  * wake up scheduler
  */