MAINTAINERS: .mailmap: Update Hans de Goede's email address

I'm moving all my kernel work over to using my kernel.org email address.
Update .mailmap and MAINTAINER entries still using hdegoede@redhat.com.

Signed-off-by: Hans de Goede <hansg@kernel.org>
Link: https://lore.kernel.org/r/20250609143558.42941-2-hansg@kernel.org


Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>