platform/x86: lenovo-yogabook: Simplify gpio lookup table cleanup

After the devm_gpiod_get("backside_hall_sw") call the gpio lookup table
is no longer necessary.

Remove it directly after this call instead using a devm reset-action
for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230430165807.472798-6-hdegoede@redhat.com