arm64: zynqmp: List lpd watchdog in dtsi

There are use cases where lpd watchdog can be configured for APU use. By
design this IP should be listed in zynqmp.dtsi to make sure that node is
properly enabled by DTG.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynqmp-clk-ccf.dtsi

@@ -267,6 +267,10 @@
 	clocks = <&clk 75>;
 };
 
+&lpd_watchdog {
+	clocks = <&clk 75>;
+};
+
 &xilinx_ams {
 	clocks = <&clk 70>;
 };

arch/arm/dts/zynqmp-clk.dtsi

@@ -225,6 +225,10 @@
 	clocks = <&clk250>;
 };
 
+&lpd_watchdog {
+	clocks = <&clk250>;
+};
+
 &zynqmp_dpsub {
 	clocks = <&dp_aclk>, <&dp_aud_clk>, <&drm_clock>;
 };

arch/arm/dts/zynqmp.dtsi

@@ -1083,6 +1083,15 @@
 			timeout-sec = <10>;
 		};
 
+		lpd_watchdog: watchdog@ff150000 {
+			compatible = "cdns,wdt-r1p2";
+			status = "disabled";
+			interrupt-parent = <&gic>;
+			interrupts = <0 52 1>;
+			reg = <0x0 0xff150000 0x0 0x1000>;
+			timeout-sec = <10>;
+		};
+
 		xilinx_ams: ams@ffa50000 {
 			compatible = "xlnx,zynqmp-ams";
 			status = "disabled";