ARM: dts: imx7d: Fix pcie node warnings

Fix the unit address notation and pass bus-range property in order to
fix the following build warnings with W=1:

arch/arm/boot/dts/imx7d-cl-som-imx7.dtb: Warning (pci_bridge): Node /soc/aips-bus@30800000/pcie@0x33800000 missing bus-range for PCI bridge
arch/arm/boot/dts/imx7d-cl-som-imx7.dtb: Warning (unit_address_format): Failed prerequisite 'pci_bridge'
arch/arm/boot/dts/imx7d-cl-som-imx7.dtb: Warning (pci_device_reg): Failed prerequisite 'pci_bridge'
arch/arm/boot/dts/imx7d-cl-som-imx7.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge'
arch/arm/boot/dts/imx7d-cl-som-imx7.dtb: Warning (simple_bus_reg): Node /soc/aips-bus@30800000/pcie@0x33800000 simple-bus unit address format error, expected "33800000"

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>