ARM: dts: imx6q-sabresd: add volume up/down gpio keys

Add volume up/down gpio keys support in imx6q-sabresd.dts.

Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
1 file changed