CFGCH_BW_20M
rf_reg18 |= FIELD_PREP(RR_CFGCH_BW, CFGCH_BW_20M);
rf_reg18 |= FIELD_PREP(RR_CFGCH_BW, CFGCH_BW_20M);
rf_reg18 |= FIELD_PREP(RR_CFGCH_BW, CFGCH_BW_20M);
rf_reg18 |= FIELD_PREP(RR_CFGCH_BW, CFGCH_BW_20M);