power: smb1355: Disable SMB1355 on probe

Currently, we assume SMB1355 is configured in command control mode
by default. Fix this assumption by configuring SMB1355 to command
control mode on probe.

Change-Id: I357dc750724c264f52fd058a9f851b65df16a423
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>