bnxt_en: Add VF load path and PF/VF context differentiation

[chandrakanth.patil_broadcom.com]

Summary

Enable the driver to distinguish a Physical Function from a Virtual
Function at probe time and configure each appropriately.
Add VF device IDs for all NetXtreme-C/E generations including Thor1/2
and Hyper-V variants. Refactor the iflib shared context initialisation
so PF and VF instances are selected dynamically at registration time.
Update the firmware capability and configuration query paths to populate
PF and VF specific state separately. Ensure the VF requests PF approval
for its firmware-assigned MAC address during attach and refreshes it on
each bring-up.