staging: rtl8723bs: Add a blank line after declarations

This patch adds a blank line in order to fix checkpatch warning

Signed-off-by: Kang Minchul <tegongkang@gmail.com>
Link: https://lore.kernel.org/r/20220922122310.3379711-5-tegongkang@gmail.com


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