wifi: ath12k: Fix spelling mistakes in warning messages and comments

There are quite a few spelling mistakes in warning messages and a lot
of the comments. Fix these.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230214092122.265336-1-colin.i.king@gmail.com