wifi: ath9k: miscellaneous spelling fixes

Correct spelling here and there as suggested by codespell.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20241111104724.484586-1-dmantipov@yandex.ru


Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>