arm64: dts: imx8mq: Add missing pci property

Add the required bus-range property to PCI RC node. Fixes the warning:
pcie@33c00000: 'bus-range' is a required property
  From schema: Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -1579,6 +1579,7 @@ pcie1: pcie@33c00000 {
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
+			bus-range = <0x00 0xff>;
 			ranges =  <0x81000000 0 0x00000000 0x27f80000 0 0x00010000>, /* downstream I/O 64KB */
 				  <0x82000000 0 0x20000000 0x20000000 0 0x07f00000>; /* non-prefetchable memory */
 			num-lanes = <1>;