arm64: dts: imx8mq: Move the opp table out of bus node

Move opp-table node from soc node to root node.

opp-table node does not have any register properties and thus
shouldn't be placed inside the bus.

This fixes the following build warnings with W=1:

arch/arm64/boot/dts/freescale/imx8mq.dtsi:687.28-703.5: Warning (simple_bus_reg): /soc@0/opp-table: missing or empty reg/ranges property

Fixes: 64d26f8c ("arm64: dts: imx8mq: Add the opp table and cores opp properties")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq.dtsi

@@ -137,6 +137,24 @@ A53_L2: l2-cache0 {
 		};
 	};
 
+	a53_opp_table: opp-table {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-800000000 {
+			opp-hz = /bits/ 64 <800000000>;
+			opp-microvolt = <900000>;
+			clock-latency-ns = <150000>;
+		};
+
+		opp-1000000000 {
+			opp-hz = /bits/ 64 <1000000000>;
+			opp-microvolt = <1000000>;
+			clock-latency-ns = <150000>;
+			opp-suspend;
+		};
+	};
+
 	pmu {
 		compatible = "arm,cortex-a53-pmu";
 		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
@@ -838,25 +856,6 @@ usb3_phy1: usb-phy@382f0040 {
 			status = "disabled";
 		};
 
-
-		a53_opp_table: opp-table {
-			compatible = "operating-points-v2";
-			opp-shared;
-
-			opp-800000000 {
-				opp-hz = /bits/ 64 <800000000>;
-				opp-microvolt = <900000>;
-				clock-latency-ns = <150000>;
-			};
-
-			opp-1000000000 {
-				opp-hz = /bits/ 64 <1000000000>;
-				opp-microvolt = <1000000>;
-				clock-latency-ns = <150000>;
-				opp-suspend;
-			};
-		};
-
 		gic: interrupt-controller@38800000 {
 			compatible = "arm,gic-v3";
 			reg = <0x38800000 0x10000>,	/* GIC Dist */