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arm64: dts: qcom: ipq8074: set Gen2 PCIe pcie max-link-speed

Add the generic 'max-link-speed' property to describe the Gen2 PCIe link
generation limit.
This allows the generic DWC code to configure the link speed correctly.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230113164449.906002-4-robimarko@gmail.com

authored by

Robert Marko and committed by
Bjorn Andersson b6059031 2055cb7d

+1
+1
arch/arm64/boot/dts/qcom/ipq8074.dtsi
··· 766 766 linux,pci-domain = <1>; 767 767 bus-range = <0x00 0xff>; 768 768 num-lanes = <1>; 769 + max-link-speed = <2>; 769 770 #address-cells = <3>; 770 771 #size-cells = <2>; 771 772