arm/dt: msm8226: Add support for gpio keys

Add support for volume up, camera focus and camera
snapshot keys.  Since these use msm gpios,
interrupt information must be used at the top level
for gpio_to_irq call to work correctly.

Change-Id: I054e1078d8adcb73b15a97f34a5e8865ab43925c
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
4 files changed