power: smb1355: Lower P2F charge threshold to 2.6V

Currently, SMB1355's pre-to-fast charge threshold is 3.6V. Set 2.6V
before enabling parallel charging, to allow parallel charging
to be enabled when VBAT < 3.6V.

CRs-Fixed: 2127501
Change-Id: I308c6fffbf50e5219128ea0bc47eb77f57f73e46
Signed-off-by: Harry Yang <harryy@codeaurora.org>
1 file changed