Revert "input: touchscreen: shutdown ST touch's power supply when suspend"

This reverts commit 0085ca6d.
DVDD is always on. And keep both these two LDOs on when suspend.

Change-Id: I3a49cd6e719181eafbd83877586f7aaecd9649e7
Signed-off-by: Fei Mao <feim1@codeaurora.org>