power: qcom: smb1390: Add IREV IRQ handler to toggle switcher

Add support to toggle SMB1390 switcher as part of IREV IRQ
handling. This will ensure SMB1390 is not stuck in disabled
state.

CRs-Fixed: 2200344

Change-Id: Ia2139d00965544e1dbb6d33685346dfbe5293337
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>