MAINTAINERS: wifi: Add N: ath1*k entries to match .yaml files

In [1] it was observed that the ath12k maintainers were not added to
the review of a new ath12k YAML file. Bartosz suggested "adding an N:
ath12k entry to MAINTAINERS" to prevent this in the future. In the
process it was noticed that one of the ath11k YAML files was also not
explicitly referenced, so add N: entries to ath10k, ath11k, and
ath12k, and remove the explicit F: entries.

Link: https://lore.kernel.org/linux-wireless/20240216203215.40870-7-brgl@bgdev.pl/

 [1]
Suggested-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240217-update-maintainer-v1-2-1426cf7a8bb1@quicinc.com