power: battery: Fix SMB1355 Parallel Charging disabling issue

PARALLEL_PSY_VOTER is a voter to disable SMB1355 parallel charging only
when parallel psy is not present. However, there are cases in the current
implementation retaining PARALLEL_PSY_VOTER veto even after parallel psy
is detected present.

Fix it.

CRs-Fixed: 2313484
Change-Id: I89242d13ffce52d7090abf8c01357d3938edf751
Signed-off-by: Harry Yang <harryy@codeaurora.org>