ARM64: dts: meson-gxl: libretech-cc: enable high speed modes

Enable sdcard UHS modes up to SDR50. Unfortunately, it seems the PCB of
the libretech-cc cannot handle SDR104 at 200Mhz reliably.
Also enable eMMC DDR52 mode.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts

@@ -205,6 +205,9 @@ &sd_emmc_b {
 
 	bus-width = <4>;
 	cap-sd-highspeed;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
 	max-frequency = <100000000>;
 	disable-wp;
 
@@ -224,6 +227,7 @@ &sd_emmc_c {
 
 	bus-width = <8>;
 	cap-mmc-highspeed;
+	mmc-ddr-3_3v;
 	max-frequency = <50000000>;
 	non-removable;
 	disable-wp;