staging: rtl8723bs: remove blank line from include/autoconf.h

Remove additional blank line from include/autoconf.h, fixes one
checkpatch check notice.

Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210210170024.100937-1-phil@philpotter.co.uk


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