[PATCH] drm: Constify drm_mode_config atomic helper private pointer

[Brian Starkey]

On Mon, Jan 02, 2017 at 11:16:13AM +0200, Laurent Pinchart wrote:
>The drm_mode_config helper private field points to a structure of
>function pointers that don't need to be modified at runtime. Make it
>const.
>
>Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

Acked-by: Brian Starkey <brian.starkey at arm.com>