input: touchscreen: cyttsp5: use workqueue to call resume

The fb_notifier calling resume is blocking the wakeup of screen,
schedule a work to resume the touch screen when turning on the fb.
This could reduce the latency when waking up the phone.

Change-Id: I0d0d93972e6d775082f9453fb5dc984a56701f73
Signed-off-by: Jiangjiang Shen <jiangjia@codeaurora.org>