arm/dt: msm8610: Add bus voting from USB

USB peripheral needs certain bus bandwidth requirements to meet
data call and mass storage throughput. Add these bus voting
requirements to usb device tree node.

Change-Id: I550596598377892a2beaa7ed496fdd0eaf82a894
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Vamsi Krishna <vskrishn@codeaurora.org>