power: smb1390-psy: Do not read the registers before system resume

Do not read the charge pump registers before the driver resume
which is invoked during the system resume process. This prevents
from flagging unnecessary errors due to power_supply_events during
the early resume of the system.

Change-Id: Ib6766f5c4df0483f0909cf901af74ffecfcd62ac
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>