Merge branch 'mlx4_en-num-of-rings'

Tariq Toukan says:

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mlx4_en num of rings

This patchset from Inbar contains changes to rings control
to the mlx4 Eth driver.

Patches 1 and 2 limit the number of rings to the number of CPUs.
Patch 3 removes a limitation in logic of default number of RX rings.

Series generated against net-next commit:
812b5ca7 Add a driver for Renesas uPD60620 and uPD60620A PHYs
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Signed-off-by: David S. Miller <davem@davemloft.net>