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 <[e-mail]>
Signed-off-by: Paul Mundt <[e-mail]>

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

···
 	while (t--) {
 		if (!ctrl_inw(EEPROM_STAT))
 			return 1;
-		cpu_relax();
+		udelay(1);
 	}
 
 	printk(KERN_ERR "ms7724se can not access to eeprom\n");