staging: rtl8723bs: remove unused rf_reg_dump() function argument

remove unused function argument void *sel from rf_reg_dump.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/32d99e0a094cc59a35788c468dd3e20b486c9e20.1619254603.git.fabioaiuto83@gmail.com


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