arm64: dts: broadcom: bcm4908: describe firmware partitions

BCM4908 bootloader supports multiple firmware partitions and has its own
bindings defined for them.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts

@@ -135,6 +135,7 @@
 		};
 
 		partition@100000 {
+			compatible = "brcm,bcm4908-firmware";
 			label = "firmware";
 			reg = <0x100000 0x4400000>;
 		};

arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts

@@ -122,7 +122,7 @@
 	#size-cells = <0>;
 
 	partitions {
-		compatible = "fixed-partitions";
+		compatible = "brcm,bcm4908-partitions";
 		#address-cells = <1>;
 		#size-cells = <1>;
 
@@ -130,5 +130,15 @@
 			label = "cferom";
 			reg = <0x0 0x100000>;
 		};
+
+		partition@100000 {
+			compatible = "brcm,bcm4908-firmware";
+			reg = <0x100000 0x5700000>;
+		};
+
+		partition@5800000 {
+			compatible = "brcm,bcm4908-firmware";
+			reg = <0x5800000 0x5700000>;
+		};
 	};
 };