Update own report in nr_db if SSID is changed

Update own report in nr_db if SSID is changed

short_ssid in the own neighbor report might get out of sync, causing
advertising RNR element based on the old SSID, when SSID is changed
either with control interface command SET or with SIGHUP. Therefore,
sync the own report entry by removing the old entry and setting own
report again if the short SSID value has changed.

Signed-off-by: Nikita Chernikov <nchernikov@maxlinear.com>