usb: omap1: OTG controller driver

Transceivers need to manage OTG controller state on OMAP1 to enable
switching between peripheral and host modes. Provide a driver for that.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --cc drivers/usb/phy/Kconfig
Simple merge

diff --cc drivers/usb/phy/Makefile
Simple merge

diff --cc drivers/usb/phy/phy-omap-otg.c
Simple merge