[ARM] spelling fixes

Spelling fixes in arch/arm/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/plat-s3c24xx/pm.c

@@ -555,7 +555,7 @@ static int s3c2410_pm_enter(suspend_state_t state)
 	__raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
 	__raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
 
-	/* call cpu specific preperation */
+	/* call cpu specific preparation */
 
 	pm_cpu_prep();