mmc: dw_mmc: exynos: fix the suspend/resume issue for exynos5433

Before enabling the clock, dwmmc exynos driver is trying to access the
register. Then the kernel panic can be occurred.

Signed-off-by: Jaehoon Chung <[e-mail]>
Reviewed-by: Chanwoo Choi <[e-mail]>
Tested-by: Chanwoo Choi <[e-mail]>
Cc: [e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/dw_mmc-exynos.c

···
 static int dw_mci_exynos_runtime_resume(struct device *dev)
 {
 	struct dw_mci *host = dev_get_drvdata(dev);
+	int ret;
+
+	ret = dw_mci_runtime_resume(dev);
+	if (ret)
+		return ret;
 
 	dw_mci_exynos_config_smu(host);
-	return dw_mci_runtime_resume(dev);
+
+	return ret;
 }
 
 /**