ASoC: wcd9xxx: integrate 4-pole extension cable support

Commit 07b6bd6a9a1e431a86efa76b14030d882ee7771b is checked into wcd9310
driver to support 4-pole extension cable detection.
Integrate the commit to wcd9xxx-mbhc driver.

Change-Id: I44973b5d9562b71b041498e3c9ad9709f4266181
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
3 files changed