Merge branch 'smc-log-state-changes-and-cleanup'

Karsten Graul says:

====================
smc: log state changes and cleanup

Patch 1 adds the logging of important state changes to enable SMC-R
users to detect SMC-R link groups that are not redundant and require
user actions. Patch 2 is a contribution to clean up an unused inline
function.
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Signed-off-by: David S. Miller <davem@davemloft.net>