hwmon: Handle failure to register sensor with thermal zone correctly

Merge Request Required Information

Summary of Changes

If devm_thermal_zone_of_sensor_register() returns -ENODEV, report that the sensor was not attached to a thermal zone
but continue to register the hwmon device.

## Approved Bugzilla Ticket
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2122394

Upstream Status: git@gitlab.com:redhat/centos-stream/src/kernel/centos-stream-9.git

Signed-off-by: David Marlin <dmarlin@redhat.com>

## Scratch Brew build
https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=49249631

## Description
If an attempt is made to a sensor with a thermal zone and it fails,
the call to devm_thermal_zone_of_sensor_register() may return -ENODEV.
This can result in a crash (NULL pointer dereference).

The hwmon core needs to handle all errors returned from calls
to devm_thermal_zone_of_sensor_register(). If the call fails
with -ENODEV, report that the sensor was not attached to a
thermal zone  but continue to register the hwmon device.