[IrDA]: MCS7780 usb_driver struct should be static

This patch makes a needlessly global struct static.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NSamuel Ortiz <samuel@sortiz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/irda/mcs7780.c

@@ -101,7 +101,7 @@ static int transceiver_type = MCS_TSC_VISHAY;
 module_param(transceiver_type, int, 0444);
 MODULE_PARM_DESC(transceiver_type, "IR transceiver type, see mcs7780.h.");
 
-struct usb_driver mcs_driver = {
+static struct usb_driver mcs_driver = {
 	.name = "mcs7780",
 	.probe = mcs_probe,
 	.disconnect = mcs_disconnect,