sweep2wake: we no longer need irq_wake. remove it.
Also clean up variable declariation to save some space

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
sweep2wake: disabled as default, enable it over apps/sysfs

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
sweep2wake: cleanup header file

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