tspdrv: add userspace vibration strength control (1/2)

Change-Id: Ie0941223f07a5df6baadad6b8228cc91710040c9
Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>

Code clean-ups & vibration strength over stock 126 value
Signed-off-by: Jean-Pierre Rasquin <yank555.lu@gmail.com>

Conflicts:
	drivers/motor/tspdrv.c
tspdrv: Move vibrator sysfs node

Change-Id: Ia5ab68694b6829d88ff7be5c2729c2e0396495b9