ARM: S3C6410: use correct divider_shift in setrate_clksrc()

In s3c64xx_setrate_clksrc() we used sclk->shift, but actually need to
use sclk->divider_shift to correctly calculate the value for the divider
register.
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
[ben-linux@fluff.org: Minor re-indentation of description]
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

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

@@ -302,8 +302,8 @@ static int s3c64xx_setrate_clksrc(struct clk *clk, unsigned long rate)
 		return -EINVAL;
 
 	val = __raw_readl(reg);
-	val &= ~(0xf << sclk->shift);
-	val |= (div - 1) << sclk->shift;
+	val &= ~(0xf << sclk->divider_shift);
+	val |= (div - 1) << sclk->divider_shift;
 	__raw_writel(val, reg);
 
 	return 0;