Adding dynamic read-ahead
sweep2wake: massive update, bring on par with s2w2 except algorithm

This patches sweep2wake on par with s2w2, minus the detection algorithm.
Changes in detail:
- Remove dependency on a power key setter, use a dummy device.
- Remove dependency on a touchscreen driver, use an input callback
- Remove dependency on external sysfs functions
- Remove dependency on external reset calls
- Migrate all of this into sweep2wake

Porting to new devices is now easier than ever:
1. Define your device parameters in the Sweep2wake tuneables
2. Check if the android_touch_kobj is already used by your touchscreen driver
2a. If it is export it and define S2W_ANDROID_TOUCH_DECLARED
(This will prevent s2w from spawning it's own kobj)
3. Force the touchscreen driver to deliver signals in suspend and you are done.

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
Signed-off-by: flar2 <asegaert@gmail.com>