DARWIN: update fan_service.json

[adamcalabrigo]

Description

Updates fan_service.json for DARWIN platform with the following changes:

1. Fix scale factor for TH3 diode temp sensors. Currently, the raw value is scaled by sensor_service, then again here, resulting in erroneously low readings. Leave it to sensor_service to scale sensors.
2. Add Rackmon fan as fan6 to ensure that fan_service is driving its PWM correctly.

Test Plan

Tested on Darwin with Linux kernel 6.4 and CentOS 9.

fan_service runs correctly, sensor scale is correct and all fan RPMs and LEDs are updated:

I1015 02:05:21.869820 10429 Utils.cpp:139] The config is valid
I1015 02:05:21.871098 10429 ControlLogic.cpp:68] Upon fan_service start up, program all fan pwm with transitional value of 50
I1015 02:05:21.872616 10429 ControlLogic.cpp:443] fan_1: Programmed with PWM 50 (raw value 128)
I1015 02:05:21.874653 10429 ControlLogic.cpp:443] fan_2: Programmed with PWM 50 (raw value 128)
I1015 02:05:21.876638 10429 ControlLogic.cpp:443] fan_3: Programmed with PWM 50 (raw value 128)
I1015 02:05:21.878667 10429 ControlLogic.cpp:443] fan_4: Programmed with PWM 50 (raw value 128)
I1015 02:05:21.880649 10429 ControlLogic.cpp:443] fan_5: Programmed with PWM 50 (raw value 128)
I1015 02:05:21.884615 10429 ControlLogic.cpp:443] fan_6: Programmed with PWM 50 (raw value 128)
...
I1015 02:05:28.620519 10441 Bsp.cpp:303] Got sensor data from sensor_service.  Item count: 90
I1015 02:05:28.620554 10441 ControlLogic.cpp:99] Successfully fetched sensor data.
I1015 02:05:28.620949 10441 ControlLogic.cpp:109] Successfully fetched optics data.
I1015 02:05:28.620955 10441 ControlLogic.cpp:571] Processing Sensors ...
I1015 02:05:28.620978 10441 ControlLogic.cpp:220] SC_TH3_DIODE1_TEMP: Calculated PWM is 24
I1015 02:05:28.621008 10441 ControlLogic.cpp:220] SC_TH3_DIODE2_TEMP: Calculated PWM is 24
I1015 02:05:28.621013 10441 ControlLogic.cpp:575] Processing Optics ...
I1015 02:05:28.621017 10441 ControlLogic.cpp:579] Processing Fans ...
I1015 02:05:28.622292 10441 ControlLogic.cpp:365] fan_1: is present in the host (through sysfs)
I1015 02:05:28.626693 10441 ControlLogic.cpp:168] fan_1: RPM read is 12145
I1015 02:05:28.627689 10441 ControlLogic.cpp:365] fan_2: is present in the host (through sysfs)
I1015 02:05:28.631686 10441 ControlLogic.cpp:168] fan_2: RPM read is 11904
I1015 02:05:28.632671 10441 ControlLogic.cpp:365] fan_3: is present in the host (through sysfs)
I1015 02:05:28.636684 10441 ControlLogic.cpp:168] fan_3: RPM read is 12048
I1015 02:05:28.637642 10441 ControlLogic.cpp:365] fan_4: is present in the host (through sysfs)
I1015 02:05:28.641644 10441 ControlLogic.cpp:168] fan_4: RPM read is 12295
I1015 02:05:28.642640 10441 ControlLogic.cpp:365] fan_5: is present in the host (through sysfs)
I1015 02:05:28.646643 10441 ControlLogic.cpp:168] fan_5: RPM read is 12048
I1015 02:05:28.646690 10441 ControlLogic.cpp:365] fan_6: is present in the host (through sysfs)
I1015 02:05:28.651575 10441 ControlLogic.cpp:168] fan_6: RPM read is 11611
I1015 02:05:28.651593 10441 ControlLogic.cpp:631] Boost mode enabled for optics update missing for 1728957928s
I1015 02:05:28.651601 10441 ControlLogic.cpp:500] zone1: Components: SC_TH3_DIODE1_TEMP,SC_TH3_DIODE2_TEMP,qsfp_group_1. Aggregation Type: ZONE_TYPE_MAX. Aggregate PWM is 60.
I1015 02:05:28.653653 10441 ControlLogic.cpp:443] fan_1: Programmed with PWM 53 (raw value 135)
I1015 02:05:28.655634 10441 ControlLogic.cpp:443] fan_2: Programmed with PWM 53 (raw value 135)
I1015 02:05:28.657638 10441 ControlLogic.cpp:443] fan_3: Programmed with PWM 53 (raw value 135)
I1015 02:05:28.659618 10441 ControlLogic.cpp:443] fan_4: Programmed with PWM 53 (raw value 135)
I1015 02:05:28.661608 10441 ControlLogic.cpp:443] fan_5: Programmed with PWM 53 (raw value 135)
I1015 02:05:28.665609 10441 ControlLogic.cpp:443] fan_6: Programmed with PWM 53 (raw value 135)
I1015 02:05:28.665653 10441 ControlLogic.cpp:463] fan_1: Setting LED to Good (value: 2)
I1015 02:05:28.665672 10441 ControlLogic.cpp:463] fan_2: Setting LED to Good (value: 2)
I1015 02:05:28.665686 10441 ControlLogic.cpp:463] fan_3: Setting LED to Good (value: 2)
I1015 02:05:28.665699 10441 ControlLogic.cpp:463] fan_4: Setting LED to Good (value: 2)
I1015 02:05:28.665711 10441 ControlLogic.cpp:463] fan_5: Setting LED to Good (value: 2)
I1015 02:05:28.669580 10441 ControlLogic.cpp:463] fan_6: Setting LED to Good (value: 2)

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