Add a GNVS variable to store trackpad IRQ for google/parrot, so
that both SNB and IVB variants can be built with the same config
Change-Id: I232da4077e3400b8ef2520dc33fd770c731b7ec3
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/20092
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>