ASoC: hdmi-codec: Add RX support

HDMI interface can also be used as receiver, this patch is to
add such support. The most difference compare with TX is that RX
don't need to get edid information.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1606372608-2329-1-git-send-email-shengjiu.wang@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>