Revert "ARM: dts: msm: disable maxim touch node for MSM8937"

This reverts commit 2744b25d ("ARM: dts: msm: disable maxim
touch node for MSM8937").
This change is needed for enabling the ARM based touch as the other
feature i.e. DSP based touch is having many performance and power
issues.

Change-Id: Ia0bc06a6975f7c1047d4a00ff6acfa2bcfdcf429
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>