arm: dts: lx2160ardb: support eMMC HS400 mode

Add properties related to eMMC HS400 mode.

mmc-hs400-1_8v;
bus-width = <8>;

They had been already in kernel dts file since the first
lx2160ardb dts patch.

b068890 arm64: dts: add LX2160ARDB board support
Signed-off-by: NYangbo Lu <yangbo.lu@nxp.com>

arch/arm/dts/fsl-lx2160a-rdb.dts

@@ -80,6 +80,8 @@
 &esdhc1 {
 	status = "okay";
 	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
+	bus-width = <8>;
 };
 
 &fspi {