drm: omapdrm: crtc: get manual mode displays working

With manual mode displays we need to flush the panel manually.

Let's add flushing so we get Tomi's fbtest, kmstest, kmstest --flip,
and X and wayland working.

Signed-off-by: Tony Lindgren <tony@atomide.com>
[On Nokia N950]
Tested-By: Sebastian Reichel <sre@kernel.org>
1 file changed