ARM: S3C64XX: Fix divider value calculation in s3c64xx_roundrate_clksrc

In s3c64xx_roundrate_clksrc function, the calculation is wrong. This
patch fixes this calculation.
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

arch/arm/plat-s3c64xx/s3c6400-clock.c

@@ -345,7 +345,7 @@ static unsigned long s3c64xx_roundrate_clksrc(struct clk *clk,
 	if (rate > parent_rate)
 		rate = parent_rate;
 	else {
-		div = rate / parent_rate;
+		div = parent_rate / rate;
 
 		if (div == 0)
 			div = 1;