iavf: Fix up debug print macro

This aligns the iavf_debug() macro with the other Intel drivers.

Add the bus number, bus_id field to i40e_bus_info so output shows
each physical port(i.e func) in following format:
  [[[[<domain>]:]<bus>]:][<slot>][.[<func>]]
domains are numbered from 0 to ffff), bus (0-ff), slot (0-1f) and
function (0-7).

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>