staging: rtl8723bs: remove 5Ghz field in struct registry_priv

remove unused 5Ghz field in struct registry_priv.

Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/3a58fae5330a321dd570d1a7931a5b17bb3996a8.1624367071.git.fabioaiuto83@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>