maintainers: update with official intel support link, new maintainer

Add an official link which is designed to guide the user to the appropriate
support resource (be it community, OEM, Intel phone, Intel email, etc)

Add the current e1000 maintainer to the list of Intel maintainers.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>