staging: rtl8723bs: remove unused ODM_CMNINFO_BOARD_TYPE enum item

remove ODM_CMNINFO_BOARD_TYPE enum item, fix comments
accordingly (given that 5GHz code isn't supported).

Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/e3adfc218779c9c1ea904e806f77fc5007be180f.1624367072.git.fabioaiuto83@gmail.com


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