ARM: dts: hummingboard/cubox-i: add USB OC pinctrl configuration

Hummingboard has no over current hardware, so disable the over current
detection for both ports.

Cubox-i has over current hardware, so appropriately configure this.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>