Add a blank line to avoid this Sphinx warning:
	./drivers/w1/w1_io.c:197: WARNING: Definition list ends without a blank line; unexpected unindent.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: NEvgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>