MAINTAINERS: Add Peter Xu and myself as co-maintainer of "Memory API"

Peter and myself volunteered to help out co-maintaining "Memory API"
with Paolo, so let's update the MAINTAINERS file.

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210723100532.27353-3-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed