ARM: dts: msm: GPIO97 control to AFE driver on MSM8939

GPIO 97 controls panel enablement and is currently controlled
by display driver. Display turns it down during suspend to
save power. However, this blocks touch-to-wake feature.

Change-Id: I93bad4e23874fec9c8922624ff6953764bf4d643
Signed-off-by: Chun Zhang <chunz@codeaurora.org>