video: Add damage notification on bmp display

Let's report the video damage when we draw a bitmap on the screen. This
way we can later lazily flush only relevant regions to hardware.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reported-by: Da Xue <da@libre.computer>
Reviewed-by: Simon Glass <sjg@chromium.org>
Link: https://lore.kernel.org/u-boot/20230821135111.3558478-9-alpernebiyasak@gmail.com/
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