sh: ms7724: Correct sh-eth EEPROM polling timeout.

This converts the cpu_relax() to a udelay(1), which fixes up issues with
the EEPROM polling occasionally timing out.
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/mach-se/7724/setup.c

@@ -533,7 +533,7 @@ static int __init sh_eth_is_eeprom_ready(void)
 	while (t--) {
 		if (!ctrl_inw(EEPROM_STAT))
 			return 1;
-		cpu_relax();
+		udelay(1);
 	}
 
 	printk(KERN_ERR "ms7724se can not access to eeprom\n");