ARM: dts: msm: Disable vibrator overdrive for pm6150

There are scenarios where Vbat is lower than overdrive
voltage causing the vibrator to fail. Disabling overdrive
does not have a performance impact, hence disable it.

Change-Id: Iec507c2fe2dda532d4c054883c8ad30e78dd3461
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>