staging: rtl8723bs: remove unused bb_reg_dump() function argument

remove unused function argument void *sel from bb_reg_dump.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/62bfb844bc77818ca0595b369e64eca3b8872470.1619254603.git.fabioaiuto83@gmail.com


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