ASoC: msm8x10: Update headset thresholds for 2.7 volts micbias

Update the voltage thresholds used by headset detection module according
to 2.7 volts micbias.

CRs-fixed: 537966, 554536
Change-Id: I3a9e669220d72168c01832c625a64e9986443fb3
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>