staging: rtl8723bs: Remove multiple blank lines

This patch removes multiple blank lines to solve the warning found by
checkpatch.
Signed-off-by: Javier F. Arias <jarias.linux@gmail.com>
Link: https://lore.kernel.org/r/257b08ad13aa23c2ee53fc333ea3c3f7e3105791.1573577309.git.jarias.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>