mb/google/poppy/variants/nautilus: Add gpio-keys ACPI node for PENH

This change uses gpio_keys driver to add ACPI node for pen eject event.

BUG=b:71329519
TEST=Verified using evtest that pen eject event results in events as
expected.

Change-Id: Ib293c2ca532c8ed9e2587143b1a69300cd9fa4e9
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/23238
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
3 files changed