Add the codec driver of the internal DAC found on Amlogic gxl, g12a and
sm1 family.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200219173503.1112561-3-jbrunet@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>