[Nokia ixs7215] Platform API temperature threshold value fixes

[dflynn-Nokia]

Incorrect high-threshold and critical-high-threshold values are displayed for
some of the temperature sensors. This commit fixes that.

Why I did it

Incorrect high-threshold and critical-high-threshold values are displayed for
some of the temperature sensors

How I did it

Modify the thermal sensor Platform API 2.0 implementation to return the correct values.

How to verify it

Ensure that the 'show platform temperature' command show the correct high-threshold and critical-high-threshold values for each thermal sensor.

Values displayed before the fix.

admin@localhost:~$ show platform temperature
     Sensor    Temperature    High TH    Low TH    Crit High TH    Crit Low TH    Warning          Timestamp
-----------  -------------  ---------  --------  --------------  -------------  ---------  -----------------
ADT7473-CPU         23          191.0       N/A           100.0            N/A      False  20220328 16:08:56
ADT7473-LOC         23.5        191.0       N/A           100.0            N/A      False  20220328 16:08:56
ADT7473-MAC         22.5        191.0       N/A           100.0            N/A      False  20220328 16:08:56
   CPU Core         21.5          N/A       N/A             N/A            N/A      False  20220328 16:08:56
    PCB MAC         27.375       80.0       N/A             N/A            N/A      False  20220328 16:08:56
    PCB PHY         21.5         80.0       N/A             N/A            N/A      False  20220328 16:08:56

Values displayed after the fix

admin@challenger:~$ show platform temperature 
     Sensor    Temperature    High TH    Low TH    Crit High TH    Crit Low TH    Warning          Timestamp
-----------  -------------  ---------  --------  --------------  -------------  ---------  -----------------
ADT7473-CPU         24          100.0       N/A             N/A            N/A      False  20220328 15:49:09
ADT7473-LOC         25          100.0       N/A             N/A            N/A      False  20220328 15:49:09
ADT7473-MAC         23.5        100.0       N/A             N/A            N/A      False  20220328 15:49:09
   CPU Core         22.625        N/A       N/A             N/A            N/A      False  20220328 15:49:09
    PCB MAC         28.75        80.0       N/A             N/A            N/A      False  20220328 15:49:09
    PCB PHY         22.625       80.0       N/A             N/A            N/A      False  20220328 15:49:09

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[dflynn-Nokia]

/azpw run Azure.sonic-buildimage

[mssonicbld]

/AzurePipelines run Azure.sonic-buildimage

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[Blueve]

Do we have any test in sonic-mgmt can catch this issue?

[qiluo-msft]

This commit could not be cleanly cherry-picked to 202012. Please submit another PR.