pwrctrl → fault Relation

File in psfb_droop.X/sources/pwrctrl	Includes file in psfb_droop.X/sources/fault
pwrctrl_isr.c	fault.h
pwrctrl_isr_extension.c	fault.h
pwrctrl_sm.c	fault.h
pwrctrl_typedef.h	fault_typedef.h