MAINTAINERS: adjust file entries after wifi driver movement

Commit f79cbc77 ("wifi: move mac80211_hwsim and virt_wifi to virtual
directory") and commit 298e50ad ("wifi: move raycs, wl3501 and
rndis_wlan to legacy directory") move remaining wireless drivers into
subdirectories, but does not adjust the entries in MAINTAINERS.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about
broken references.

Repair these file references in those wireless driver sections.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230314041848.5120-1-lukas.bulwahn@gmail.com