TMP461: Add support for ADT7461 sensor
The register map failry similar, with one difference in the local temperature register width.
Both sensors support two reading - "local" and "remote".
While here add support for the latter one.
The ADT7461 doesn't update the temperature correctly, unless a write transaction
is done before every read. Do just that as a workaround for this issue.
Tested on LS1046ARDB.