Revert "touchscreen: cyttsp-i2c-qc: Add low power mode functionality"

This reverts commit 304d9f51.
low power mode changes are causing issues like,delay in reponse to
touch , and controller is not recognizing the touch events as its
scan rate is also low in low power mode state . since controller is
not recognizing the touch in low power mode state , so only way
for the controller to come out of low power mode is to do multi-touch
and controller responds randomly to one of the touches and comes out
of the low power mode.

Signed-off-by: Sreenivasulu Chalam Charla <sreeniva@codeaurora.org>

Change-Id: I35e0797f819cfbce6630d70af443b96546eacfb5
Signed-off-by: Neha Pandey <nehap@codeaurora.org>