DWC3 has separate irq line for OTG interrupts (e.g. ID / BSV). These interrupts are needed to detect cable connect and disconnect events. Hence, request for this interrupt line from OTG driver. Also, update device tree binding documentation for DWC3 core. Change-Id: Ie97e4b3b5dcf840eabeb01b5c5d6531a8a70a3c9 Signed-off-by: Manu Gautam <mgautam@codeaurora.org>