arm64: dts: fvp/juno: Fix bus node names

Most Arm Ltd. boards are employing a layered bus structure, to map
the hardware design (SoC, motherboard, IOFPGA) and structure the DTs.

The "simple-bus" nodes only allow a limited set of node names. Switch
to use *-bus to be binding compliant.

This relies on a pending dt-schema.git fix for now:
devicetree-org/dt-schema#38

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andre Przywara <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>

Author: Andre-ARM

arch/arm/boot/dts/vexpress-v2m-rs1.dtsi

@@ -174,7 +174,7 @@
 	};
 
 	bus@8000000 {
-		motherboard {
+		motherboard-bus {
 			model = "V2M-P1";
 			arm,hbi = <0x190>;
 			arm,vexpress,site = <0>;
@@ -220,7 +220,7 @@
 				port1-otg;
 			};
 
-			iofpga@300000000 {
+			iofpga-bus@300000000 {
 				compatible = "simple-bus";
 				#address-cells = <1>;
 				#size-cells = <1>;

arch/arm64/boot/dts/arm/foundation-v8.dtsi

@@ -178,7 +178,7 @@
 			interrupts = <15>;
 		};
 
-		iofpga@300000000 {
+		iofpga-bus@300000000 {
 			compatible = "simple-bus";
 			#address-cells = <1>;
 			#size-cells = <1>;

arch/arm64/boot/dts/arm/juno-base.dtsi

@@ -828,7 +828,7 @@
 				<0 0 12 &gic 0 GIC_SPI 169 IRQ_TYPE_LEVEL_HIGH>;
 	};
 
-	site2: tlx@60000000 {
+	site2: tlx-bus@60000000 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;

arch/arm64/boot/dts/arm/juno-motherboard.dtsi

@@ -92,7 +92,7 @@
 	};
 
 	bus@8000000 {
-		motherboard {
+		motherboard-bus {
 			compatible = "arm,vexpress,v2p-p1", "simple-bus";
 			#address-cells = <2>;  /* SMB chipselect number and offset */
 			#size-cells = <1>;
@@ -133,7 +133,7 @@
 				vddvario-supply = <&mb_fixed_3v3>;
 			};
 
-			iofpga@300000000 {
+			iofpga-bus@300000000 {
 				compatible = "simple-bus";
 				#address-cells = <1>;
 				#size-cells = <1>;

arch/arm64/boot/dts/arm/rtsm_ve-motherboard-rs2.dtsi

@@ -6,10 +6,10 @@
  */
 / {
 	bus@8000000 {
-		motherboard {
+		motherboard-bus {
 			arm,v2m-memory-map = "rs2";
 
-			iofpga@300000000 {
+			iofpga-bus@300000000 {
 				virtio-p9@140000 {
 					compatible = "virtio,mmio";
 					reg = <0x140000 0x200>;

arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi

@@ -77,7 +77,7 @@
 	};
 
 	bus@8000000 {
-		motherboard {
+		motherboard-bus {
 			arm,v2m-memory-map = "rs1";
 			compatible = "arm,vexpress,v2m-p1", "simple-bus";
 			#address-cells = <2>; /* SMB chipselect number and offset */
@@ -98,7 +98,7 @@
 				interrupts = <15>;
 			};
 
-			iofpga@300000000 {
+			iofpga-bus@300000000 {
 				compatible = "simple-bus";
 				#address-cells = <1>;
 				#size-cells = <1>;