• Unconditionally turn on SIOCGI2C probing for all interfaces on "ifconfig -v". I've seen no measurable timing difference for doing additional SIOCGI2C call for system with 4k vlans.
• Determine appropriate handler (SFP/QSFP) by reading identification byte (which is the same for both SFF-8472 and SFF-8436) instead of checking driver name.

MFC with: r270064
Sponsored by: Yandex LLC