arm64: dts: imx8mm: split PCIe ranges

Two entries are expected for PCIe ranges.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm.dtsi

@@ -1345,8 +1345,8 @@ pcie0: pcie@33800000 {
 			#size-cells = <2>;
 			device_type = "pci";
 			bus-range = <0x00 0xff>;
-			ranges =  <0x81000000 0 0x00000000 0x1ff80000 0 0x00010000 /* downstream I/O 64KB */
-				   0x82000000 0 0x18000000 0x18000000 0 0x07f00000>; /* non-prefetchable memory */
+			ranges = <0x81000000 0 0x00000000 0x1ff80000 0 0x00010000>, /* downstream I/O 64KB */
+				 <0x82000000 0 0x18000000 0x18000000 0 0x07f00000>; /* non-prefetchable memory */
 			num-lanes = <1>;
 			num-viewport = <4>;
 			interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;