title: Update System and keep the data stored on EEPROM (meta-roc yocto)
body: <p>Hi, i have two system(s) on my board : system A and system B. The system B updates the first one using the yocto meta-rauc.
  I want to write some data in EEPROM through the system A only once. So if i update A the data in EEPROM , it dosen't erase.
  Have you any idea, how it's done?
  Thank you.</p>