Merge branch 'mlxsw-Expose-critical-and-emergency-module-alarms'

Ido Schimmel says:

====================
mlxsw: Expose critical and emergency module alarms

Amit says:

Extend hwmon interface with critical and emergency module alarms.

In case that current module temperature is higher than emergency
threshold, EMERGENCY alarm will be reported in sensors utility:

$ sensors
...
front panel 025:  +55.0°C  (crit = +35.0°C, emerg = +40.0°C) ALARM(EMERGENCY)

In case that current module temperature is higher than critical
threshold, CRIT alarm will be reported in sensors utility:

$ sensors
...
front panel 025:  +54.0°C  (crit = +35.0°C, emerg = +80.0°C) ALARM(CRIT)

Patch set overview:

Patches #1-#2 make several changes to make the code easier to change.

Patch #3 extends the hwmon interface with the new module alarms.
====================

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