power: smb1398: 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

While at it, reset rc to 0 after reading suspend_props in smb1390
driver.

Change-Id: I84d2203f6ec833033386797792c80cd1781dbf58
Signed-off-by: Ashish Chavan <ashichav@codeaurora.org>