Merge branch 'mv88e6xxx-ATU-occupancy-as-devlink-resource'

Andrew Lunn says:

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mv88e6xxx ATU occupancy as devlink resource

This patchset add generic support to DSA for devlink resources. The
Marvell switch Address Translation Unit occupancy is then exported as
a resource. In order to do this, the number of ATU entries is added to
the per switch info structure. Helpers are added, and then the
resource itself is then added.
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Signed-off-by: David S. Miller <davem@davemloft.net>