ASoC: msm: Add support for 4-pole extension cable

- Add the support to report lineout device when inserted plug
  has high impedance on microphone line.
- This feature is enabled only with gpio headset detection.

Change-Id: I55acbba62603ddfe93f4e6a32aca240bad2849fd
Signed-off-by: Ravi Kumar Alamanda <ralama@codeaurora.org>