arm/dt: 8974 liquid: Add support for gpio-keys

Add support for liquid specific gpio keys -

Volume up: pmic gpio 5
Volume down: pmic gpio 2
Home: pmic gpio 1

CRs-fixed: 360518
Change-Id: I444e8b93758dd8cbdc5c40a329794e6d1432aff2
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
1 file changed