input: ft5x06: defer touch resume to workqueue

During device resume, the touch resume function is called after display's
resume. In this case, the ft5x06's resume function needs to wait for
200ms because of reset requirement. Defer the touch resume to a workqueue
to reduce the total device resume time. For this an optional DT property
is added to enable this on targets that need this feature.

200ms because of reset requirement. Defer the touch resume to a workqueue
to reduce the total device resume time. For this an optional DT property
is added to enable this on targets that need this feature.

Change-Id: I9be0c803aee28b62dc772c4512ee2d9e48e8e218
Signed-off-by: zhaoyuan <yzhao@codeaurora.org>