wifi: ath: fix repeated words in comments

Delete the redundant word 'have'.

Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220709124036.49674-1-yuanjilin@cdjrlc.com