ASoC: support external codec for 8916

8916 supports external audio codec (tapan) over I2C\I2S.
Add suport for tapan audio codec and also add pinctrl support
for codec reset GPIO.

Change-Id: I3f2820139c644bd993c17e12e27f7a54f58f692e
Signed-off-by: Aravind Kumar <akumark@codeaurora.org>