ec/lenovo/pmh7: use read/write function in clear_bit/set_bit

Make the code simpler and improve readability.

Change-Id: Ifa9308c32e4646c122254931b55fb83541a10a3c
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: https://review.coreboot.org/28195
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
1 file changed