mmc: dw_mmc: remove the deprecated "supports-highspeed" property

Remvoe the deprecated "supports-highspeed" property.
DWMMC controller will not use this property anymore.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/dw_mmc.c

@@ -2964,11 +2964,6 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
 			return ERR_PTR(ret);
 	}
 
-	if (of_find_property(np, "supports-highspeed", NULL)) {
-		dev_info(dev, "supports-highspeed property is deprecated.\n");
-		pdata->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
-	}
-
 	return pdata;
 }