ARM: dts: rmobile: Enable eMMC DDR52 modes on Gen3 Salvator-X(S),ULCB,Ebisu

Enable DDR52 modes, since the SD core supports correct switching now.
For completeness, list HS200 modes, however those were already enabled.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/dts/r8a77950-salvator-x-u-boot.dts b/arch/arm/dts/r8a77950-salvator-x-u-boot.dts
index 6e5c271..e039e33 100644
--- a/arch/arm/dts/r8a77950-salvator-x-u-boot.dts
+++ b/arch/arm/dts/r8a77950-salvator-x-u-boot.dts
@@ -16,6 +16,8 @@
 };
 
 &sdhi2 {
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
 	mmc-hs400-1_8v;
 	max-frequency = <200000000>;
 };