power: main: Add conditional compilation for touch nodes

Add conditional compilation for touch event sysfs nodes. Otherwise,
if
CONFIG_PM_SLEEP is not defined, there could be compilation
errors.

Change-Id:
I1ac7f284ec35eae2cfa076ef8e71c29ddc24817c
Signed-off-by: Amar Singhal
<asinghal@codeaurora.org>
Signed-off-by: Anurag Singh
<anursing@codeaurora.org>

idea is taken here -
https://github.com/rmbq/android_kernel_htc_msm8960/commit/e22cbdd27a2ce17dfbbc1cfd0dab3219f143aced