r8169: fix missing loop variable increment

Spotted-by: Citizen Lee <citizen_lee@thecus.com>
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/r8169.c

@@ -2002,7 +2002,7 @@ static void rtl8169_set_magic_reg(void __iomem *ioaddr, unsigned mac_version)
 	u32 clk;
 
 	clk = RTL_R8(Config2) & PCI_Clock_66MHz;
-	for (i = 0; i < ARRAY_SIZE(cfg2_info); i++) {
+	for (i = 0; i < ARRAY_SIZE(cfg2_info); i++, p++) {
 		if ((p->mac_version == mac_version) && (p->clk == clk)) {
 			RTL_W32(0x7c, p->val);
 			break;