Improve performance of polar initialization
improves the polar_params function to not break the real time when we initialize new polar context
without this improvement, the msg4 ack always fails if the cell setup contains modifications that lead to make new DCI configurations
because the real time break, the PUCCH is not sent on time (USRP trace LLLL between the RRCsetup reception and the related UL ACK in PUCCH)