ARM: dts: OMAP5: Add OMAP control usb data

Add omap control usb data in OMAP5 device tree file.
This will have the register address of registers to
power on the USB2 PHY and USB3 PHY.

The information for the node added here is available in
Documentation/devicetree/bindings/usb/omap-usb.txt

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>