staging: rtl8723bs: Insert blank line after declarations

This patch fixes checkpatch warning as follows:

  WARNING: Missing a blank line after declarations

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kang Minchul <tegongkang@gmail.com>
Link: https://lore.kernel.org/r/20220917181620.3237192-1-tegongkang@gmail.com


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