RT_AR_DELTA
ATH9K_POW_SM(RT_AR_DELTA(rate2s), 24)
| ATH9K_POW_SM(RT_AR_DELTA(rate2l), 16)
| ATH9K_POW_SM(RT_AR_DELTA(rate1l), 0));
ATH9K_POW_SM(RT_AR_DELTA(rate11s), 24)
| ATH9K_POW_SM(RT_AR_DELTA(rate11l), 16)
| ATH9K_POW_SM(RT_AR_DELTA(rate5_5s), 8)
| ATH9K_POW_SM(RT_AR_DELTA(rate5_5l), 0));
| ATH9K_POW_SM(RT_AR_DELTA(rateExtCck), 16)
| ATH9K_POW_SM(RT_AR_DELTA(rateDupCck), 0));