mmc: ftsdc010: Support High-Speed mode

ftsdc010 dm driver has been disable High-Speed mode
as default to work around Andes AE3XX platform's problem,
because of it does not support High-Speed mode in
commit id 73cd56b2.

But other platforms or SoCs maybe support this function.
So High-Speed mode can be enabled from dts with
cap-mmc-highspeed or cap-sd-highspeed property.
Signed-off-by: NRick Chen <rick@andestech.com>
Signed-off-by: NRick Chen <rickchen36@gmail.com>

drivers/mmc/nds32_mmc.c

@@ -103,6 +103,11 @@ static int nds32_mmc_probe(struct udevice *dev)
 	if (ret < 0)
 		return ret;
 #endif
+
+	if (dev_read_bool(dev, "cap-mmc-highspeed") || \
+		  dev_read_bool(dev, "cap-sd-highspeed"))
+		chip->caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
+
 	ftsdc_setup_cfg(&plat->cfg, dev->name, chip->buswidth, chip->caps,
 			priv->minmax[1] , priv->minmax[0]);
 	chip->mmc = &plat->mmc;