fix 5G NR SA FDD configs for 24 and 25 PRBs
Make sure the SSB is offset by 4 PRBs from the BW start. Therefore, the ARFCN for the SSB center must be offset by 14 PRB from the ARFCN for the BW start.
Also, fix the gNB to print the correct --CO parameter for the OAI UE in FDD case.