MFC r331443:
Improve support for health recovery in mlx5core.

This patch accumulates the following Linux commits:

• 04c0c1ab38e95105d950db5b84e727637e149ce7 net/mlx5: PCI error recovery health care simulation
• 0179720d6be2096b8d0a4d143254ff9e77747daa net/mlx5: Introduce trigger_health_work function
• 3fece5d676939f42f434c63dfe1bd42d7d94e6f0 net/mlx5: Continue health polling until it is explicitly stopped

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