Dell SMF driver hwmon number reorder fix for Dell S6100/Z9100

[paavaanan]

- What I did

• Dell SMF driver initialiation with hwmon support changes from hwmon0 to hwmon1. This happens when Ingrasys enabled coretemp kernel driver. At the time of coretemp initalization with hwmon it allocates handle [hwmon0] to intel coretemp. Due to non-availablity next order [hwmon1] is alloted to SMF driver.

• This order changes affects the existing scripts which rely on existing numerbing scheme.

root@sonic-s6100-01:/sys/class/hwmon# ls -lart
total 0
drwxr-xr-x  2 root root 0 Nov 26 05:03 .
lrwxrwxrwx  1 root root 0 Nov 26 05:03 hwmon1 -> ../../devices/platform/SMF.512/hwmon/hwmon1
lrwxrwxrwx  1 root root 0 Nov 26 05:03 hwmon0 -> ../../devices/platform/coretemp.0/hwmon/hwmon0
drwxr-xr-x 40 root root 0 Nov 26 05:03 ..
root@sonic-s6100-01:/sys/class/hwmon# cd ../../dev

- How I did it

• So, fixed scripts psuutil.py and platform_sensors.py to detect the numbering scheme dynamically from sysfs and construct the valid path accordingly.

- How to verify it

1. Execute platform_sensors.py
2. Execute psuutil status

[jleveque]

This appears to be a duplicate of #2305. Why two duplicate PRs?

[paavaanan]

This fix is raised for March Branch...

[jleveque]

Since the changes are identical between both branches, we don't need two separate PRs. We can merge the other one into the master branch and then cherry-pick that commit into the March branch. This prevents the need to review 2 PRs and creates less room for error if the PRs drift. I recommend closing this PR and working with #2305 only.

[paavaanan]

Thanks Joe!

[paavaanan]

re-opened the PR to merge this fix in March Branch

[jleveque]

Retest this please.