MFC r330644 and r330714:
Updates for PCI and health monitor recovery in mlx5core.
This patch accumulates the following Linux commits:

mlx5_health.c

• 78ccb25861d76a8fc5c678d762180e6918834200 mlx5_core: Fix wrong name in struct
• 171bb2c560f45c0427ca3776a4c8f4e26e559400 mlx5_core: Update health syndromes
• 0144a95e2ad53a40c62148f44fb0c1f9d2a0d1e9 mlx5_core: Use accessor functions to read from device memory
• ac6ea6e81a80172612e0c9ef93720f371b198918 mlx5_core: Use private health thread for each device
• fd76ee4da55abb21babfc69310d321b9cb9a32e0 mlx5_core: Fix internal error detection conditions
• 2241007b3d783cbdbaa78c30bdb1994278b6f9b9 mlx5: Clear health sick bit when starting health poll
• 712bfef60912d91033cb25739f7444d5b8d8c59f mlx5: Fix version printout in case of health issue
• 89d44f0a6c732db23b219be708e2fe1e03ee4842 mlx5_core: Add pci error handlers to mlx5_core driver

mlx5_cmd.c

• be87544de8df2b1eb34bcb5e32691287d96f9ec4 mlx5_core: Fix async commands return code
• a31208b1e11df334d443ec8cace7636150bb8ce2 mlx5_core: New init and exit flow for mlx5_core
• 020446e01eebc9dbe7eda038e570ab9c7ab13586 mlx5_core: Prepare cmd interface to system errors handling
• 89d44f0a6c732db23b219be708e2fe1e03ee4842 mlx5_core: Add pci error handlers to mlx5_core driver
• 0d834442cc247c7b3f3bd6019512ae03e96dd99a mlx5: Fix teardown errors that happen in pci error handler

mlx5_main.c

• 5fc7197d3a256d9c5de3134870304b24892a4908 mlx5: Add pci shutdown callback

Submitted by: Matthew Finlay <matt@mellanox.com>
Sponsored by: Mellanox Technologies