Call drm_fb_helper_restore_fbdev_mode() upon last close so that in the
event of the X server crashing, we have some kind of mode restored.
Reviewed-by: NRob Clark <robdclark@gmail.com>
Reviewed-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>