wlan.4: add rtw89 driver to see also

Sponsored by: The FreBSD Foundation
X-MFC: no iwx.4 in stable/14 yet
Reviewed by: ziaee
Differential Revision: https://reviews.freebsd.org/D50788

(cherry picked from commit a3d38c1abf6c7987ece04c5eb27b0a48ecd88c0d)