ASoC: WCD9304: Fix MBHC 8 button detection

On WCD9304, the bandgap reference voltage is configurable. With
bandgap in MBHC mode, this adjustment factor was incorrect causing
button voltages to be beyond the expected thresholds.

Fix by appropriately configuring the bandgap reference voltage

Change-Id: I17184bedc64a424b639187fd9358506c29a44495
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
2 files changed