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
parent
80f67cd8
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