ssb: use u16 for storing board rev

Specs say about size 2 (u16) and my 14e4:4727 has board rev 0x1211.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/linux/ssb/ssb.h

@@ -25,7 +25,7 @@ struct ssb_sprom {
 	u8 et1phyaddr;		/* MII address for enet1 */
 	u8 et0mdcport;		/* MDIO for enet0 */
 	u8 et1mdcport;		/* MDIO for enet1 */
-	u8 board_rev;		/* Board revision number from SPROM. */
+	u16 board_rev;		/* Board revision number from SPROM. */
 	u8 country_code;	/* Country Code */
 	u16 leddc_on_time;	/* LED Powersave Duty Cycle On Count */
 	u16 leddc_off_time;	/* LED Powersave Duty Cycle Off Count */