ASoC: msm8226: add support for primary AUXPCM

Add support for GPIOs for primary AUXPCM interface. Add support
for both 8KHz and 16KHz frequencies.
Update the Device Tree documentation with binding information
for MSM8226 Sound device.

Change-Id: I800fb0a152e64c8f4ef45cf4518c9378918bb044
Signed-off-by: Banajit Goswami <bgoswa@codeaurora.org>
3 files changed