power: smb1355: put in suspend before shutdown

SMB1355 is not reset on device reboot, so its state will remain.
Suspend charging in shutdown hook to prevent parallel charging
before charger drivers are ready after reboot.

CRs-Fixed: 2044532
Change-Id: I128d7e17e7adfda7be7ed60c4961b1ba4dbd3cbf
Signed-off-by: Harry Yang <harryy@codeaurora.org>