net: Revert devlink health changes.

net: Revert devlink health changes.

This reverts the devlink health changes from 9/17/2019,
Jiri wants things to be designed differently and it was
agreed that the easiest way to do this is start from the
beginning again.

Commits reverted:

b8d6b760c291697957c428041e387121cca26f93
727228ab2566723f561258f07cf86c6e99c53e85
055e9b025882aaf9478ab65aa7b7c18b51e1d688
0c43e78ca569dcc032cfa5191573cbb61e1e66a1
46fc6c45980239ffc53a427b192efe435ee0f22d
163041282d838bc4d0aeace91be5b0a2073d4501
8402d64a73d3e1c5ade6876fb1d82a65bca626eb
6e90f581713dbdb0c51ef47ac3fe9b327f5a6935
92831be782dfbcdcd44a96ae92d0532771f335d5
55eea45630d1cb6f550445bfb50e5a3bb3e79a5a
f6deb9c1d01a88031a559149904b710001cbde70

And the follow-on build fix:

o33a0efa4baecd689da9474ce0e8b673eb6931c60

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