RRSR_12M
basic_rates = RRSR_6M | RRSR_12M | RRSR_24M;
u16 rrsr_2g_allow_mask = (RRSR_24M|RRSR_12M|RRSR_6M|RRSR_CCK_RATES);
if ((BrateCfg & (RRSR_24M|RRSR_12M|RRSR_6M)) == 0)