qpnp-smb2: do not configure BATT_OV to end charging cycle

Currently, we configure charger to end the charging cycle when
battery overvoltage is detected. This ends up the charging cycle
prematurely sometimes when charging phase transitions from fast
to taper. Disable this.

Change-Id: I8ac486fcb10e823671a8e8b438b7fc76a8969b7c
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>