arm64: dts: mt8167: Align mmsys node name with dtschema

The node name should be generic and mmsys expcets 'syscon'
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230209160357.19307-2-matthias.bgg@kernel.orgSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8167.dtsi

@@ -124,7 +124,7 @@ pio: pinctrl@1000b000 {
 			interrupts = <GIC_SPI 134 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
-		mmsys: mmsys@14000000 {
+		mmsys: syscon@14000000 {
 			compatible = "mediatek,mt8167-mmsys", "syscon";
 			reg = <0 0x14000000 0 0x1000>;
 			#clock-cells = <1>;