mmc: atmel-sdhci: use mmc_of_parse to get the DT properties

Call mmc_of_parse at probe time to fetch all the host properties
from the DT.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/mmc/atmel_sdhci.c b/drivers/mmc/atmel_sdhci.c
index c67b065..f56ae63 100644
--- a/drivers/mmc/atmel_sdhci.c
+++ b/drivers/mmc/atmel_sdhci.c
@@ -89,6 +89,10 @@
 	if (ret)
 		return ret;
 
+	ret = mmc_of_parse(dev, &plat->cfg);
+	if (ret)
+		return ret;
+
 	host->max_clk = max_clk;
 	host->mmc = &plat->mmc;
 	host->mmc->dev = dev;