arm64: dts: broadcom: Add firmware clocks and power nodes to Pi5 DT

BCM2712 still uses the firmware clocks and power drivers, so add
them to the base device tree.

The brcm,bcm2836-l1-intc controller isn't used on this platform.
It is used on 32-bit kernels for the smp_boot_secondary hook, but
BCM2712 can't run a 32-bit kernel.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://lore.kernel.org/r/20241025-drm-vc4-2712-support-v2-34-35efa83c8fc0@raspberrypi.com
Link: https://lore.kernel.org/r/20241212-dt-bcm2712-fixes-v3-7-44a7f3390331@raspberrypi.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

Author: 6by9

arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts

@@ -62,3 +62,31 @@
 	sd-uhs-ddr50;
 	sd-uhs-sdr104;
 };
+
+&soc {
+	firmware: firmware {
+		compatible = "raspberrypi,bcm2835-firmware", "simple-mfd";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		mboxes = <&mailbox>;
+		dma-ranges;
+
+		firmware_clocks: clocks {
+			compatible = "raspberrypi,firmware-clocks";
+			#clock-cells = <1>;
+		};
+
+		reset: reset {
+			compatible = "raspberrypi,firmware-reset";
+			#reset-cells = <1>;
+		};
+	};
+
+	power: power {
+		compatible = "raspberrypi,bcm2835-power";
+		firmware = <&firmware>;
+		#power-domain-cells = <1>;
+	};
+
+};

arch/arm64/boot/dts/broadcom/bcm2712.dtsi

@@ -221,11 +221,6 @@
 			#mbox-cells = <0>;
 		};
 
-		local_intc: interrupt-controller@7cd00000 {
-			compatible = "brcm,bcm2836-l1-intc";
-			reg = <0x7cd00000 0x100>;
-		};
-
 		uart10: serial@7d001000 {
 			compatible = "arm,pl011", "arm,primecell";
 			reg = <0x7d001000 0x200>;