usb: udc: add udc.h include file

Move common definitions to udc.h
This allows musb_udc.h to be removed as well.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 05d1b56..733558d 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -16,6 +16,7 @@
 #include <asm/arch/hardware.h>
 #include <asm/io.h>
 #include <usb/pxa27x_udc.h>
+#include <usb/udc.h>
 
 #include "ep0.h"