net/mlx5: fix hex dump of error completion

net/mlx5: fix hex dump of error completion

struct mlx5_cqe is defined in MLX5 PMD code (mlx5_prm.h).
It includes 64 bytes padding in case of (RTE_CACHE_LINE_SIZE == 128).

struct mlx5_err_cqe is defined in kernel, and doesn't include padding.

When running in debug mode, in case an error CQE is detected
it is printed using rte_hexdump().

The size of data to print should be sizeof(*cqe) instead of
sizeof(*err_cqe), to handle the case of (RTE_CACHE_LINE_SIZE == 128),
and print the full data in any case.

Fixes: c7714992092f ("net/mlx5: extend debug logs verbosity")
Cc: stable@dpdk.org
Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>