ASoC: CS8427: Add initial driver for cs8427 chip

Introduce initial cs8427 driver which is compliant
To ASoC codec driver standards.

Change-Id: Ie4fc0a3fc9b97f3ab0fbac2f0a3232078035fdae
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>
5 files changed