vibrator function (needed for s2w/dt2w/TS stuff)

Conflicts:
	drivers/misc/pm8xxx-vibrator.c
	include/linux/mfd/pm8xxx/vibrator.h

Change-Id: Idfcbb655fc2ec555dc9d79c20019904d72495cd3
Signed-off-by: flar2 <asegaert@gmail.com>