ARM: dts: msm: Add USB support in dtsi files for msm8916 bringup

Add device tree entries for USB OTG device to operate in
peripheral mode, add handle to pmic regulators node, add
phy type, add otg-control as phy control. Add android usb
device node

Change-Id: I96b58c0ac6a978a119c56c5c20e9f085e18852fa
Signed-off-by: Tarun Gupta <tarung@codeaurora.org>