drm/gma500: add comments for new parameters

Added comments for new parameters.
Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1476238699-25820-1-git-send-email-jiang.biao2@zte.com.cn

drivers/gpu/drm/gma500/gtt.c

@@ -76,6 +76,7 @@ static u32 __iomem *psb_gtt_entry(struct drm_device *dev, struct gtt_range *r)
  *	psb_gtt_insert	-	put an object into the GTT
  *	@dev: our DRM device
  *	@r: our GTT range
+ *	@resume: on resume
  *
  *	Take our preallocated GTT range and insert the GEM object into
  *	the GTT. This is protected via the gtt mutex which the caller
@@ -321,6 +322,7 @@ void psb_gtt_unpin(struct gtt_range *gt)
  *	@len: length (bytes) of address space required
  *	@name: resource name
  *	@backed: resource should be backed by stolen pages
+ *	@align: requested alignment
  *
  *	Ask the kernel core to find us a suitable range of addresses
  *	to use for a GTT mapping.