ARM:dts:apq: Video DSI Configuration Fixes for sbc8096

Power supply fixes for DSI:
	1. Configure power supply without "lab" and "ibb" regulators.
	2. Fix PWM GPIO configuration.

CRs-fixed: 968430
Change-Id: I29ffa1c84790322eeda95b53b3f9ef96c838d90c
Signed-off-by: Anna Hanna Sedlak Grinbaum <asedla@codeaurora.org>
Signed-off-by: Shimrit Malichi <smalichi@codeaurora.org>
Signed-off-by: Tanya Finkel <tfinkel@codeaurora.org>