staging: rtl8723bs: Fix remaining blank line issue

Fix the following checkpatch blank line issue:
- CHECK: Please don't use multiple blank lines

Signed-off-by: Franziska Naepelt <franziska.naepelt@googlemail.com>
Link: https://lore.kernel.org/r/20230701102613.5420-1-franziska.naepelt@googlemail.com


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