net-sysfs: get_netdev_queue_index() cleanup

net-sysfs: get_netdev_queue_index() cleanup

Redo commit a963a741bb3906d9f9960db0ea844775ee8bf7ac.

Commit 1f5661afc01f3a0d00a95eb08d992ba1acddee65 ("net: Add max rate tx queue
attribute") moved get_netdev_queue_index around, but kept the old version.
Probably because of a reuse of the original patch from before Eric's change to
that function.

Remove one inline keyword, and no need for a loop to find
an index into a table.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
Fixes: 1f5661afc01f ("net: Add max rate tx queue attribute")
Acked-by:  Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>