LGE files: regulator API reverted back to vreg.c

Change-Id: I70dda1e8cb33f8821126bbab50f4cee2efa8e387
Signed-off-by: Randolf Kastenmaier <randolf.kastenmaier@gmail.com>
LED: enable HW button backlights

Change-Id: Ib081f011e6364d28087febb83ae87c15098b20eb
Signed-off-by: Randolf Kastenmaier <randolf.kastenmaier@gmail.com>