power: smb1360: Fix to apply the latest input-current configuration

To move to a new (higher) input-current setting, first set USB500 and
then USBAC. This makes sure that the new ICL setting takes affect.

Change-Id: I2bfe65ccf3e0c2e50783916b58ab6acb6e2546d7
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>