fec: Fix KS8721BL_ICSR phy register offset

According to the datasheet the ICSR register is at offset 27, not 22.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Acked-by: NGreg Ungerer <gerg@uclinux.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/fec.c

@@ -1111,7 +1111,7 @@ static phy_info_t const phy_info_am79c874 = {
 /* register definitions for the 8721 */
 
 #define MII_KS8721BL_RXERCR	21
-#define MII_KS8721BL_ICSR	22
+#define MII_KS8721BL_ICSR	27
 #define	MII_KS8721BL_PHYCR	31
 
 static phy_cmd_t const phy_cmd_ks8721bl_config[] = {