arm64: dts: agilex: add service layer, fpga manager and fpga region

Add service layer, fpga manager and fpga region to the device tree
on Intel Agilex platform.
Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/boot/dts/intel/socfpga_agilex.dtsi

@@ -12,6 +12,19 @@ / {
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		service_reserved: svcbuffer@0 {
+			compatible = "shared-dma-pool";
+			reg = <0x0 0x0 0x0 0x1000000>;
+			alignment = <0x1000>;
+			no-map;
+		};
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -81,6 +94,13 @@ soc {
 		interrupt-parent = <&intc>;
 		ranges = <0 0 0 0xffffffff>;
 
+		base_fpga_region {
+			#address-cells = <0x1>;
+			#size-cells = <0x1>;
+			compatible = "fpga-region";
+			fpga-mgr = <&fpga_mgr>;
+		};
+
 		gmac0: ethernet@ff800000 {
 			compatible = "altr,socfpga-stmmac", "snps,dwmac-3.74a", "snps,dwmac";
 			reg = <0xff800000 0x2000>;
@@ -442,5 +462,17 @@ qspi: spi@ff8d2000 {
 
 			status = "disabled";
 		};
+
+		firmware {
+			svc {
+				compatible = "intel,stratix10-svc";
+				method = "smc";
+				memory-region = <&service_reserved>;
+
+				fpga_mgr: fpga-mgr {
+					compatible = "intel,stratix10-soc-fpga-mgr";
+				};
+			};
+		};
 	};
 };