MFC r300607

sfxge(4): cleanup: update copyright to 2016

Sponsored by: Solarflare Communications, Inc.

MFC r299901

sfxge(4): cleanup: make VPD lookups quieter

A lookup on a VPD entry which is missing reports several failure
messages as it propagates through wrapper functions. Restructured
the wrappers to treat this gracefully as an expected case.

Submitted by: Richard Houldsworth <rhouldsworth at solarflare.com>
Sponsored by: Solarflare Communications, Inc.

MFC r299596-r299606, r299681, r299726, r299738

sfxge(4): move ef10_*() functions to ef10_*.c files

Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.