msm: kgsl: Fix nice level for higher priority GPU start
 thread

Before, we were actually setting the lowest possible priority.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
msm: kgsl: Schedule adreno_start in a high priority workqueue

Better safe than sorry. Also, return early if we didn't set a _wake_timeout.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
msm: kgsl: Wake up GPU only for touch events

Register the KGSL input event handler only for
touch input events to make sure input event handler
is called only for touch input events.

Change-Id: I68938fbbf870bd3bce83cb057b504674753d6de8
Signed-off-by: Ananta Kishore K <akollipa@codeaurora.org>