nvramtool: Add dummy cmos-hw-unix accessor implementation for non-x86

The default implementation uses inb/outb, that is not available on ARM
platforms and others. A dummy implementation allows building nvramtool
on these platforms.

Change-Id: I75e4a1a0cbd35ca40f7b108658686839ccf9784a
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: https://review.coreboot.org/22562
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed