drivers/touchscreen: add sweep2wake

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
sweep2wake: fix last touch not being released

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
sweep2wake: disable as default for now
(until s2w 2.0 removes all existing issues)

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
defconfig: enable sweep2wake

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
HACK: sweep2wake: sleep the data thread for 40ms to allow i2c to wake up
Backport from s2w 2.0.

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
Build Wip!