fng-install:rtc: Added device check to RTC post-install

Added a check to the RTC post-install script, that detects if the device is a Tanaro. If it is not, the check exits the script.

Cherry-picked from 247db5f3 and 3b84b29d

requested review from @clemens.terasa

assigned to @tobias.poganiuch

enabled an automatic merge when the pipeline for 4cf7267a succeeds

merged

Integration merge request: seco-ne/yocto/manifest!800 (merged)

mentioned in merge request seco-ne/yocto/manifest!800 (merged)