[portsorch] process only updated APP_DB fields when port is already created
What I did
Fixing an issue when setting some port attribute in APPL_DB triggers serdes parameters to be re-programmed with port toggling. Made portsorch to handle only those attributes that were pushed to APPL_DB, so that serdes programming happens only by xcvrd's request to do so.
What I did
Fixing an issue when setting some port attribute in APPL_DB triggers serdes parameters to be re-programmed with port toggling. Made portsorch to handle only those attributes that were pushed to APPL_DB, so that serdes programming happens only by xcvrd's request to do so.