power: smb-lib: update USBIN_V_VOTER usage

power: smb-lib: update USBIN_V_VOTER usage

The current code enables parallel charging if a high voltage
charger is seen (QC or PD) or a high current charger is seen.

This means that parallel charger could remain enabled when PD
transitions its voltage even though it has reduced the current
to 500mA. It is desirable to disable parallel charging during
such voltage transition.

So prepare for this change by first ensuring that only a QC
charger votes for USBIN_V_VOTER. The PD charger, even while
operating at higher voltages will need to depend on USBIN_I_VOTER,
just like a simple DCP charger, to enable parallel charger.

CRs-Fixed: 2014572
Change-Id: I03dfcff44b30b06918ebf176043873fb141f485f
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>