k2u/k2ul: change vibrator level to 1700mV to match userspace default value

Conflicts:
 arch/arm/mach-msm/board-k2_u-pmic.c (board-k2_ul-pmic.c for
K2UL)

idea is taken here -
https://github.com/jrior001/Torched_kernel/commit/4e967747d67f6655a69386350b4ed33d59b9c383