Merge branch 'mlx5-build-fixes'

Saeed Mahameed says:

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Mellanox, mlx5 build fixes

I know net-next is closed but these patches are fixing some compiler
build and warnings issues people have been complaining about.

I hope it is not too late, but in case it is a lot of trouble for you,
I guess they can wait.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>