wifi: rtl8xxxu: Update module description

Make the title more future-proof, using rtw88 as a model.

Mention support for RTL8723BU, RTL8192EU, and RTL8188FU.

Correct the module name.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/ecb7512a-07e8-112d-c815-1494582de5f8@gmail.com