MFC r259150 (by adrian@) and r283864.
MFC r259150 (by adrian@) and r283864.

r259150:
Print out the full PCIe link negotiation during dmesg.

I found this useful when checking whether a NIC is in a PCIE 3.0 8x slot
or not.

r283864:
cxgbe: no need to display the per-lane GT/s rating of the pcie link.

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