ARM: dts: msm: enable touch controller for 8916

8916 CDP supports two Synaptics touchscreen controllers : S3202
and S3408. Add proper device tree configuration to bring up these
touch panels.

Change-Id: I4fd9fe3111ea148e1387a308b0766c14ee36ceea
Signed-off-by: Himanshu Aggarwal <haggarwa@codeaurora.org>