[PATCH 05/14] nvme-keyring: implement nvme_tls_psk_default()

[Sagi Grimberg]

> Implement a function to select the preferred PSK for TLS.

I think we should state both in the log message (in addition
to a comment) what is the selection criteria.

Other than that,
Reviewed-by: Sagi Grimberg <sagi at grimberg.me>