arm64: dts: mediatek: mt6795: Create soc bus node and move mmio devices

MMIO devices should be inside of a soc bus node, as it's done for the
vast majority of ARM64 devicetrees, and for almost all MTK devicetrees.
Create a simple-bus soc node and move all devices with a MMIO address
space in there.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220609112303.117928-2-angelogioacchino.delregno@collabora.comSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt6795.dtsi

@@ -117,6 +117,12 @@ timer {
 			     (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>;
 	};
 
+	soc {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		compatible = "simple-bus";
+		ranges;
+
 		sysirq: intpol-controller@10200620 {
 			compatible = "mediatek,mt6795-sysirq",
 				     "mediatek,mt6577-sysirq";
@@ -172,4 +178,5 @@ uart3: serial@11005000 {
 			clocks = <&uart_clk>;
 			status = "disabled";
 		};
+	};
 };