With MTLs, there's no "other transport" when the remote side
does not have an active NIC, so we should print a useful error
message when the modex failed (indicating lack of a NIC on
the remote side).
Signed-off-by: Brian Barrett <bbarrett@amazon.com>
(cherry picked from commit fe25097194145234c175ee0487b1fa9b13658d49)
Signed-off-by: Brian Barrett <bbarrett@amazon.com>