arm64: tegra: Fix pcie-ep DT nodes

As defined by Documentation/devicetree/bindings/pci/pci-ep.yaml,
PCIe endpoints match this pattern:

	properties:
	  $nodename:
	    pattern: "^pcie-ep@"

Change the existing ones in order to avoid those warnings:

	arch/arm64/boot/dts/nvidia/tegra194-p3509-0000+p3668-0001.dt.yaml: pcie_ep@14160000: $nodename:0: 'pcie_ep@14160000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p3509-0000+p3668-0001.dt.yaml: pcie_ep@14180000: $nodename:0: 'pcie_ep@14180000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p3509-0000+p3668-0001.dt.yaml: pcie_ep@141a0000: $nodename:0: 'pcie_ep@141a0000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p3509-0000+p3668-0000.dt.yaml: pcie_ep@14160000: $nodename:0: 'pcie_ep@14160000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p3509-0000+p3668-0000.dt.yaml: pcie_ep@14180000: $nodename:0: 'pcie_ep@14180000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p3509-0000+p3668-0000.dt.yaml: pcie_ep@141a0000: $nodename:0: 'pcie_ep@141a0000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dt.yaml: pcie_ep@14160000: $nodename:0: 'pcie_ep@14160000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dt.yaml: pcie_ep@14180000: $nodename:0: 'pcie_ep@14180000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
	arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dt.yaml: pcie_ep@141a0000: $nodename:0: 'pcie_ep@141a0000' does not match '^pcie-ep@'
		From schema: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>