extern void ar5416Clr11nAggr_20(struct ath_tx_desc *ds);
extern void ar5416Set11nBurstDuration_20(struct ath_tx_desc *ds,
a_uint32_t burstDuration);
extern void ar5416Clr11nAggr_20(struct ath_tx_desc *ds);
extern void ar5416Set11nBurstDuration_20(struct ath_tx_desc *ds,
a_uint32_t burstDuration);