mmc: sdhci-s3c: use S3C_SDHCI_CONTROL2 instead of hardcoded offset value

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/sdhci-s3c.c

@@ -80,7 +80,7 @@ static void sdhci_s3c_check_sclk(struct sdhci_host *host)
 
 		tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
 		tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
-		writel(tmp, host->ioaddr + 0x80);
+		writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2);
 	}
 }