USB: Add device id for Sierra Wireless MC8755

Adds the device id used by the UMTS cards in Lenovo X60s notebooks sold
in Europe.
Signed-off-by: NJan Luebbe <jluebbe@lasnet.de>
Cc: Kevin Lloyd <linux@sierrawireless.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/sierra.c

@@ -37,6 +37,7 @@ static struct usb_device_id id_table [] = {
 	{ USB_DEVICE(0x1199, 0x0019) },	/* Sierra Wireless AirCard 595 */
 	{ USB_DEVICE(0x1199, 0x6802) },	/* Sierra Wireless MC8755 */
 	{ USB_DEVICE(0x1199, 0x6803) },	/* Sierra Wireless MC8765 */
+	{ USB_DEVICE(0x1199, 0x6804) },	/* Sierra Wireless MC8755 for Europe */
 	{ USB_DEVICE(0x1199, 0x6812) },	/* Sierra Wireless MC8775 */
 	{ USB_DEVICE(0x1199, 0x6820) },	/* Sierra Wireless AirCard 875 */