arm64: dts: meson-axg: s400: add missing emmc pwrseq

eMMC pwrseq is defined in the s400 dts but not used in the emmc node.
This is probably just a copy/paste error

Fixes: 221cf34bac54 ("ARM64: dts: meson-axg: enable the eMMC controller")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg-s400.dts

@@ -475,6 +475,8 @@
 	mmc-ddr-1_8v;
 	mmc-hs200-1_8v;
 
+	mmc-pwrseq = <&emmc_pwrseq>;
+
 	vmmc-supply = <&vcc_3v3>;
 	vqmmc-supply = <&vddio_boot>;
 };