[MLX4] added Hibernate/Standby support. (mlnx: 2906)
Mellanox HCA cards do not have Power Management support so far.
So MLX4 driver resets the card on power-down and starts its back on power-up.
Pay attention, one can go to Standby/Hibernate only when there is no running IB applications (including WSD).
Otherwise he will get an error window with a message like: "Driver mlx4_hca.sys refuses to go Hibernate/Standby".
MTHCA driver behaves upon Hibernate/Standby the same way.
git-svn-id: svn://openib.tc.cornell.edu/gen1/trunk@1462
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