regulator: qpnp-lcdb: Handle short-circuit (SC) event

Handle the SC event in normal and TTW mode. Check if the
SC event is valid and re-enable the module to check
if it goes away. Disable the module altogether if the
SC event persists.

CRs-Fixed: 1083319
Change-Id: I20bd3ca0bd3cf273a2607656e3f51bde1eaf2dc6
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>