ARM: dts: msm: remove atmel touch node for 8909w devices

Rewove Atmel touchscreen in apq8006 and msm8909 CDP devices
which is propagated from the parent dtsi. The device supports
ITE tech and Synaptics touchscreen controllers only.

Change-Id: I682cd53d5f1440798f868f6bf3556cbed9cba00d
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>