Revert "msm8660: add additional locking protection to touckey driver"

This reverts commit 315c7d620f5f3d9be1bc51613e08af66c231aeb9.

Mutex locks in touch_led_control() are trying to lock a NULL pointer, causing a NULL pointer dereference and subsequent reboot.

Change-Id: Ib87f95f5db898664263513e8ea9de3c3f0d4384e
Revert "qt602240_ts: add additional mutex protection"

This reverts commit c69e66d1f70324f0d61766cd186d4532fa0350d7.