MAINTAINERS: mark MYRICOM MYRI-10G as Orphan

Chris's email address bounces and lore hasn't seen an email
from anyone with his name for almost a decade.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240430233532.1356982-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>