input: ft5x06_ts: fix the Focaltech CTP current leakage issue

Focaltech touch controller does not go to sleep in suspend because
the pinctrl operation inadvertently resets the touch controller.
Remove the pinctrl operation in suspend and resume callback to
prevent this spurious reset.

CRs-fixed: 677169

This patch is propagated from msm-3.10 kernel.
(commit: 89ef1cddb2ac3eb7e1f7fd2049699b251a7b9809
input: ft5x06_ts: fix the Focaltech CTP current leakage issue)

Change-Id: Ifa02c0287195d7ce55fb2d8ac49ec1c8ae5baec9
Signed-off-by: Mao Li <maol@codeaurora.org>