net/mlx5: Avoid unnecessary use of comma operator

Although it does not seem to have any untoward side-effects,
the use of ';' to separate to assignments seems more appropriate than ','.

Flagged by clang-19 -Wcomma

No functional change intended.
Compile tested only.

Signed-off-by: Simon Horman <[e-mail]>
Reviewed-by: Michal Swiatkowski <[e-mail]>
Reviewed-by: Tariq Toukan <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c

···
 		goto err_ignore;
 	}
 
-	chain = mlx5_chains_get_chain_range(chains),
+	chain = mlx5_chains_get_chain_range(chains);
 	prio = mlx5_chains_get_prio_range(chains);
 	level = mlx5_chains_get_level_range(chains);