ARM: dts: msm: Add support for PWM for BoB regulator for SM8150

Add support to camera image sensor module in order to notify BoB regulator
to switch into PWM mode at the time of power on. This helps to reduce the
analog voltage noise for Yoda power rail.

Change-Id: If09017bd976ed129e5def680d9a3e41737dbee29
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>