Merge branch 'mlxsw-line-card-prep'

Ido Schimmel says:

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mlxsw: Preparations for line cards support

Currently, mlxsw registers thermal zones as well as hwmon entries for
objects such as transceiver modules and gearboxes. In upcoming modular
systems, these objects are no longer found on the main board (i.e., slot
0), but on plug-able line cards. This patchset prepares mlxsw for such
systems in terms of hwmon, thermal and cable access support.

Patches #1-#3 gradually prepare mlxsw for transceiver modules access
support for line cards by splitting some of the internal structures and
some APIs.

Patches #4-#5 gradually prepare mlxsw for hwmon support for line cards
by splitting some of the internal structures and augmenting them with a
slot index.

Patches #6-#7 do the same for thermal zones.

Patch #8 selects cooling device for binding to a thermal zone by exact
name match to prevent binding to non-relevant devices.

Patch #9 replaces internal define for thermal zone name length with a
common define.
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Signed-off-by: David S. Miller <davem@davemloft.net>