ARM64: dts: amlogic: Add hiu and periphs buses

Add two new buses in the DTS: hiu and periphs buses.
In the Amlogic S905/GXBB SoC several devices (clock / eth / pin
controllers, etc...) are mapped under these two buses. Add them in the
DT before starting to add new devices.
Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi

@@ -167,6 +167,22 @@ uart_AO: serial@4c0 {
 			};
 		};
 
+		periphs: periphs@c8834000 {
+			compatible = "simple-bus";
+			reg = <0x0 0xc8834000 0x0 0x2000>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges = <0x0 0x0 0x0 0xc8834000 0x0 0x2000>;
+		};
+
+		hiubus: hiubus@c883c000 {
+			compatible = "simple-bus";
+			reg = <0x0 0xc883c000 0x0 0x2000>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges = <0x0 0x0 0x0 0xc883c000 0x0 0x2000>;
+		};
+
 		apb: apb@d0000000 {
 			compatible = "simple-bus";
 			reg = <0x0 0xd0000000 0x0 0x200000>;