lge_touch_core.c: Fix broken indent

Fix broken indent and coding style in lge_touch_core.c.
dt2w: Fix touchpad not working if dt2w is enabled when the screen is off

If doubletap_to_wake is set while the touch device is off, the driver
thinks there's no need to enable to device on resume operation.

Signed-off-by: Mikael Berthe <mikael@lilotux.net>
dt2w: Fix detection of double touch

The double touch detection was not working since there is no state
ABS_RELEASE.

This patch tries another approach: we rely on the fact that the first
touch event has a nul state ("DO_NOT_ANYTHING" [sic]).

Signed-off-by: Mikael Berthe <mikael@lilotux.net>
dt2w: Add a parameter to control the doubletap_to_wake timeout value

Add sysfs entry "doubletap_delay" to let userspace change the doubletap
timeout.

Signed-off-by: Mikael Berthe <mikael@lilotux.net>