net/mlx4: Fix some indent inconsistancy

Silent a few smatch warnings about indentation.
This include the removal of a 'return' statement in 'resource_tracker.c'.
This 'return' will still be performed when breaking out of the
corresponding 'switch' block.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>