USB-CDC: correct wrong alignment in ether.c

The buffer for the status request must be word aligned
because it is accessed with 32 bit pointer in the
eth_status_complete function.

Signed-off-by: Stefano Babic <sbabic@denx.de>

drivers/usb/gadget/ether.c

@@ -677,7 +677,7 @@ static struct usb_gadget_strings	stringtab = {
 
 /*============================================================================*/
 static u8 control_req[USB_BUFSIZ];
-static u8 status_req[STATUS_BYTECOUNT];
+static u8 status_req[STATUS_BYTECOUNT] __attribute__ ((aligned(4)));