USB: gadaget: add Marvell controller support

Signed-off-by: Lei Wen <leiwen@marvell.com>
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 5e72713..820ca9b 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -29,6 +29,7 @@
 ifdef CONFIG_USB_ETHER
 COBJS-y += ether.o epautoconf.o config.o usbstring.o
 COBJS-$(CONFIG_USB_ETH_RNDIS) += rndis.o
+COBJS-$(CONFIG_MV_UDC)	+= mv_udc.o
 else
 # Devices not related to the new gadget layer depend on CONFIG_USB_DEVICE
 ifdef CONFIG_USB_DEVICE