arm64: dts: Add spi slave dts

This patch adds MT2712 spi slave into device tree.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt2712e.dtsi

@@ -301,6 +301,17 @@ uart5: serial@1000f000 {
 		status = "disabled";
 	};
 
+	spis1: spi@10013000 {
+		compatible = "mediatek,mt2712-spi-slave";
+		reg = <0 0x10013000 0 0x100>;
+		interrupts = <GIC_SPI 283 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infracfg CLK_INFRA_AO_SPI1>;
+		clock-names = "spi";
+		assigned-clocks = <&topckgen CLK_TOP_SPISLV_SEL>;
+		assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL1_D2>;
+		status = "disabled";
+	};
+
 	apmixedsys: syscon@10209000 {
 		compatible = "mediatek,mt2712-apmixedsys", "syscon";
 		reg = <0 0x10209000 0 0x1000>;