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

Disable the maxim_sti touch screen node on 8937 CDP and MTP
as touchscreen is controlled by ADSP Processor from now.

Change-Id: Ia1822561bee8ebdf4160f274b959aaa3c4eab3a4
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>