at91: add CONFIG_USB_OHCI_HCD_AT91 to usb-ohci

The at91 OHCI driver has a separate Kconfig symbol with newer kernels,
include it.

Signed-off-by: Florian Fainelli <[email protected]>

SVN-Revision: 42411

package/kernel/linux/modules/usb.mk

@@ -326,6 +326,7 @@ define KernelPackage/usb-ohci
 	CONFIG_USB_OHCI \
 	CONFIG_USB_OHCI_HCD \
 	CONFIG_USB_OHCI_ATH79=y \
+	CONFIG_USB_OHCI_HCD_AT91=y \
 	CONFIG_USB_OHCI_BCM63XX=y \
 	CONFIG_USB_OCTEON_OHCI=y \
 	CONFIG_USB_OHCI_HCD_OMAP3=y \