[ARM] 4168/1: S3C24XX: use defines instead of numbers

Use defines instead of numbers.
Signed-off-by: Matt Reimer <mreimer@vpop.net>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-s3c2410/system.h

@@ -23,7 +23,6 @@ void (*s3c24xx_idle)(void);
 
 void s3c24xx_default_idle(void)
 {
-	void __iomem *reg = S3C2410_CLKCON;
 	unsigned long tmp;
 	int i;
 
@@ -33,16 +32,18 @@ void s3c24xx_default_idle(void)
 
 	/* Warning: going into idle state upsets jtag scanning */
 
-	__raw_writel(__raw_readl(reg) | (1<<2), reg);
+	__raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE,
+		     S3C2410_CLKCON);
 
 	/* the samsung port seems to do a loop and then unset idle.. */
 	for (i = 0; i < 50; i++) {
-		tmp += __raw_readl(reg); /* ensure loop not optimised out */
+		tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */
 	}
 
 	/* this bit is not cleared on re-start... */
 
-	__raw_writel(__raw_readl(reg) & ~(1<<2), reg);
+	__raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE,
+		     S3C2410_CLKCON);
 }
 
 static void arch_idle(void)