sweep2wake: Add sensitive option

This is for users (like myself) who feel like the current s2w is too tedious/precise to trigger. This option, when enabled only requires the 1st and last button to be triggered making it easier to initiate with a thumb or without making full contact & discontact with all 4 buttons.

Conflicts:
	drivers/input/keyboard/cypress-touchkey.c
cypress-touchkey: Support Sweep2Sleep and cleanup implementations

Works just like sweep2wake, but buttons should be swept from right to left, as oppose to left to right. s2w_sensitive also may apply to this.

There is also a new 3 second button sequence timeout

Conflicts:
	drivers/input/keyboard/cypress-touchkey.c
	flashable/tools/updatewild.sh