common/mlx5: fix physical port name pattern recognition

common/mlx5: fix physical port name pattern recognition

This patch makes the Infiniband device physical port name
recognition more strict. Currently mlx5 PMD might recognize
the names like "pf0sf0" erroneously as "pf0" and the wrong
device type (host PF representor) is reported.

The names like "pf0sf0" belong to PCI subfunctions which
is currently not supported by mlx5 PMD and this false
recognition must be eliminated.

Fixes: 420bbdae89f2 ("net/mlx5: fix host physical function representor naming")
Cc: stable@dpdk.org
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>