dma-buf/sw_sync: Fix kerneldoc warnings

drivers/dma-buf/sw_sync.c:248: warning: No description found for parameter 'obj'
drivers/dma-buf/sw_sync.c:248: warning: No description found for parameter 'value'
drivers/dma-buf/sw_sync.c:248: warning: Excess function parameter 'parent' description in 'sync_pt_create'
drivers/dma-buf/sw_sync.c:248: warning: Excess function parameter 'inc' description in 'sync_pt_create'

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180208113816.8288-1-chris@chris-wilson.co.uk

drivers/dma-buf/sw_sync.c

@@ -235,10 +235,10 @@ static void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
 
 /**
  * sync_pt_create() - creates a sync pt
- * @parent:	fence's parent sync_timeline
- * @inc:	value of the fence
+ * @obj:	parent sync_timeline
+ * @value:	value of the fence
  *
- * Creates a new sync_pt as a child of @parent.  @size bytes will be
+ * Creates a new sync_pt (fence) as a child of @parent.  @size bytes will be
  * allocated allowing for implementation specific data to be kept after
  * the generic sync_timeline struct. Returns the sync_pt object or
  * NULL in case of error.