software_panic: Add a new software panic type for PMIC fault
software_panic: Add a new software panic type for PMIC fault

This change adds a new software panic type PANIC_SW_PMIC_FAULT that
can be used to report any PMIC faults during previous boot.

BUG=b:65732924,b:69334392
BRANCH=None
TEST=make -j buildall

Change-Id: I218b5d01ee145bb02a773495046f4255f1ec8986
Signed-off-by: Furquan Shaikh <6be5c96c464778f89679b1062a2e0a6af93d2aa5@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/797910
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec