MAINTAINERS: add an entry for PSP

We are missing a MAINTAINERS entry for PSP, create one.

Acked-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260128210435.161061-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
1 file changed