void ath9k_hw_clr11n_aggr(struct ath_hal *ah, struct ath_desc *ds);
void ath9k_hw_set11n_virtualmorefrag(struct ath_hal *ah,
struct ath_desc *ds, u_int vmf);
void ath9k_hw_clr11n_aggr(struct ath_hal *ah, struct ath_desc *ds);
void ath9k_hw_set11n_virtualmorefrag(struct ath_hal *ah,
struct ath_desc *ds, u_int vmf);