pxa25x: Add support for USB ethernet gadget

Add to pxa25x based devices support for USB ethernet gadget. This is a
port of pxa25x UDC driver from Linux kernel.

Signed-off-by: Lukasz Dalek <luk0104@gmail.com>
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 5bbdd36..040eaba 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -36,6 +36,7 @@
 COBJS-y += ether.o epautoconf.o config.o usbstring.o
 COBJS-$(CONFIG_USB_ETH_RNDIS) += rndis.o
 COBJS-$(CONFIG_MV_UDC)	+= mv_udc.o
+COBJS-$(CONFIG_CPU_PXA25X) += pxa25x_udc.o
 else
 # Devices not related to the new gadget layer depend on CONFIG_USB_DEVICE
 ifdef CONFIG_USB_DEVICE