drm/msm: Nuke dummy fb->dirty callback

It's an optional hook.

Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464630800-30786-22-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-05-30 19:53:13 +02:00
commit 90450caf96