wifi: wil6210: fix repeated words in comments

Delete the redundant word 'for'.

Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220709132137.12442-1-yuanjilin@cdjrlc.com