fabrics: unconditionally strip discovery entry strings

fabrics: unconditionally strip discovery entry strings

The NVMe base specification defines fields TRSVCID and TRADDR
as "ASCII strings", meaning they are space-padded.
Therefore, whether spaces need to be stripped from them
doesn't depend on the transport or address family.
Some combinations already appear to be missing,
such as RDMA using IB addresses.
And if new transports are added in the future,
sanitize_discovery_log_entry() would need to be updated.

So strip spaces from these fields regardless of the entry's
transport type or address family.

Signed-off-by: Caleb Sander <csander@purestorage.com>