ASoC: msm8930: Update machine driver to support US/Euro headset

Add API to GND-MIC swap by toggle US-Euro GPIO.
Added callback function that triggers this API
during headset detection if US(Euro) type headset
is inserted into Euro(US) jack. On calling this API,
jack is changed back to US(Euro)type and headset is
detected.

Change-Id: Iec9a0f58a511c651ce6c516c77ffc86901767994
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>