net/mlx5: remove the recent devlink params

revert commit 46ae40b9 ("net/mlx5: Let user configure io_eq_size param")
revert commit a6cb08da ("net/mlx5: Let user configure event_eq_size param")
revert commit 55460406 ("net/mlx5: Let user configure max_macs param")

The EQE parameters are applicable to more drivers, they should
be configured via standard API, probably ethtool. Example of
another driver needing something similar:

https://lore.kernel.org/all/1633454136-14679-3-git-send-email-sbhatta@marvell.com/

The last param for "max_macs" is probably fine but the documentation
is severely lacking. The meaning and implications for changing the
param need to be stated.

Link: https://lore.kernel.org/r/20211026152939.3125950-1-kuba@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>