modules: gpioaei: Fix arm64.LINT-FDT breakage
'acpi_if.h' was accidentally omitted from the module Makefile; add it.
Approved by: re (kib)
Fixes: 9709bda03cd0
(cherry picked from commit bb8b3b1741188ab284e8b48ec367961a480421cb)
(cherry picked from commit 393bbd23b3446bb4ac4924f7e1c98bbdcff4455d)