mmc: s5p: fix uninitialized pointer deref on probe

Commit 3d296365e4e8 ("mmc: sdhci: Add support for
sdhci-caps-mask") sdhci_setup_cfg() expects a valid sdhci_host mmc
field.

Fixes: 3d296365e4e8 ("mmc: sdhci: Add support for sdhci-caps-mask")
Cc: Faiz Abbas <faiz_abbas@ti.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
index 9dd0b86..53efa96 100644
--- a/drivers/mmc/s5p_sdhci.c
+++ b/drivers/mmc/s5p_sdhci.c
@@ -204,13 +204,13 @@
 	if (ret)
 		return ret;
 
+	host->mmc = &plat->mmc;
+	host->mmc->dev = dev;
 	ret = sdhci_setup_cfg(&plat->cfg, host, 0, 400000);
 	if (ret)
 		return ret;
 
-	host->mmc = &plat->mmc;
 	host->mmc->priv = host;
-	host->mmc->dev = dev;
 	upriv->mmc = host->mmc;
 
 	return sdhci_probe(dev);