ARM: dts: msm: change micbias to internal for msmtitanium MTP

Headset is getting detected as headphone. Mic bias used is internal
for headset on MTP. Update the same for proper detection of
headset.

Change-Id: I957560d464a6c0587a7a202cd7cf056a62f095f1
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>