intel: Use similar brand strings to the Windows drivers

intel: Use similar brand strings to the Windows drivers

This updates our product name strings to match the ones reported
by the Windows driver, which is typically the marketing name.

We retain a platform abbreviation and GT level in parenthesis so that
we're able to distinguish similar parts more easily, helping us better
understand at a glance which GPU a bug reporter has.

Acked-by: Matt Turner <mattst88@gmail.com>
Acked-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3371>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3371>