ARM: dts: msm: update pinctrl setting for MSM8953 gpio keys

Update the pinctrl settings of gpio keys i.e. vol_up, camera-focus
and camera-snapshot for MSM8953 devices.
Also add the dt properties to make it wakeable and configure them
as input device, required by msm-4.9 gpio_keys driver.

Change-Id: Ib7411c51b9a44d9b4d2cfd7cd4a66f05ad7f0a6d
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>