RRSR_6M
basic_rates = RRSR_6M | RRSR_12M | RRSR_24M;
u16 basic_rate = RRSR_1M | RRSR_2M | RRSR_5_5M | RRSR_11M | RRSR_6M;
u16 rrsr_2g_allow_mask = (RRSR_24M|RRSR_12M|RRSR_6M|RRSR_CCK_RATES);
if ((BrateCfg & (RRSR_24M|RRSR_12M|RRSR_6M)) == 0)
BrateCfg |= RRSR_6M;