sysmbts calibration: print error if we fail to read from EEPROM
sysmbts calibration: print error if we fail to read from EEPROM

geosphere/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts