The symbols CONFIG_OMAP3_GPIO_X control if we enable the clocks for a
given GPIO bank in U-Boot.  select the required banks for each target.
In some cases we need to also migrate from CONFIG_USB_EHCI (deprecated,
in include/configs/) to CONFIG_USB_EHCI_HCD as we only require the GPIO
bank to be enabled if USB is also enabled.
Signed-off-by: NTom Rini <trini@konsulko.com>