ASoC: wcd9306: Add codec controls to get impedance of hphr and hphl

Add kcontrol to get the impedance of headphone left and headphone
right. These controls are applicable to both tapan codec versions
wcd9306 and wcd9302.

Change-Id: Ia7e22c1cabe4c5702a22f4b8cfebebc7f0bd29a7
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>
1 file changed