drm/sun4i: add lvds mode_valid function

mode_valid function is missing for lvds.

Add it making it pointed by encoder helper functions.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1520940019-68977-1-git-send-email-giulio.benetti@micronovasrl.com
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Giulio Benetti 2018-03-13 12:20:19 +01:00 • committed by Maxime Ripard
commit e4e4b7ad50
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