mmc: sdhci: Set UHS Mode Select field for UHS SDR25 mode

Set correct UHS Mode Select field value for UHS SDR25 (50MHz) mode.

Fixes: d1c0a2200afb ("mmc: sdhci: Add support for HOST_CONTROL2 and setting UHS timings")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 1389c18..86f81f5 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -518,6 +518,10 @@
 	reg &= ~SDHCI_CTRL_UHS_MASK;
 
 	switch (mmc->selected_mode) {
+	case UHS_SDR25:
+	case MMC_HS:
+		reg |= SDHCI_CTRL_UHS_SDR25;
+		break;
 	case UHS_SDR50:
 	case MMC_HS_52:
 		reg |= SDHCI_CTRL_UHS_SDR50;