The completion loop speed optimizations for error-free
operations are done - no CQE field fetch on each loop
iteration. Also, code size is oprimized - the flush
buffers routine is invoked once.
Fixes: 318ea4cfa1 ("net/mlx5: fix Tx completion descriptors fetching loop")
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>