lcd: allow lcd device to handle mode change events
Some LCD panels are capable of different resolutions, and is allowed to change at run-time, so to make "struct lcd_device" to be able to handle mode change events here. Signed-off-by: NEric Miao <eric.miao@marvell.com> Acked-by: NKrzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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