fix realtek phy id in forcedeth

As noticed by Chuck Ebbert, commit c5e3ae8823693b260ce1f217adca8add1bc0b3de
introduced a copy-paste typo, as realtek phy is 0x732 and not 0x1c1. Obvious
fix below suggested by Ayaz Abdulla.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Cc: Ayaz Abdulla <aabdulla@nvidia.com>
Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/forcedeth.c

@@ -552,7 +552,7 @@ union ring_type {
 #define PHY_OUI_MARVELL	0x5043
 #define PHY_OUI_CICADA	0x03f1
 #define PHY_OUI_VITESSE	0x01c1
-#define PHY_OUI_REALTEK	0x01c1
+#define PHY_OUI_REALTEK	0x0732
 #define PHYID1_OUI_MASK	0x03ff
 #define PHYID1_OUI_SHFT	6
 #define PHYID2_OUI_MASK	0xfc00