Revert "sweep2wake: try sysfs file. result: failure."

This reverts commit 08ca79a18ba1993ce5691afb9e2005c754c49394.
Revert "Revert "drivers/input/touchscreen/sweep2wake: if s2s_only is true, opt out early""

This reverts commit e3919412f2e3b0c08aff3d50c4adb74e0cc1f769.