mmc: dwmmc: socfpga: Get "fifo-mode" property from DT

Add FIFO mode support for SoCFPGA dwmmc, read "fifo-mode" property from DT.
Signed-off-by: NLey Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: NJaehoon Chung <jh80.chung@samsung.com>

drivers/mmc/socfpga_dw_mmc.c

@@ -144,6 +144,8 @@ static int socfpga_dwmmc_of_to_plat(struct udevice *dev)
 					"smplsel", 0);
 	host->priv = priv;
 
+	host->fifo_mode = dev_read_bool(dev, "fifo-mode");
+
 	return 0;
 }