* @mbx_addr_1_step: step address data 1
* @pcie_link_speed: current PCIe link speed (%PCI_EXP_LNKSTA_CLS_*),
* only valid for discrete (not integrated) NICs
* @mbx_addr_1_step: step address data 1
* @pcie_link_speed: current PCIe link speed (%PCI_EXP_LNKSTA_CLS_*),
* only valid for discrete (not integrated) NICs