staging: comedi: Fix line ending with a (

Fix style issue with declaration by adopting the same style as the
function defintion in drivers/staging/comedi/comedi_buf.c.

Issue reported by checkpatch.

Signed-off-by: John B. Wyatt IV <jbwyatt4@gmail.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Link: https://lore.kernel.org/r/20200329080031.511959-1-jbwyatt4@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi_internal.h

@@ -32,8 +32,8 @@ void comedi_buf_map_get(struct comedi_buf_map *bm);
 int comedi_buf_map_put(struct comedi_buf_map *bm);
 int comedi_buf_map_access(struct comedi_buf_map *bm, unsigned long offset,
 			  void *buf, int len, int write);
-struct comedi_buf_map *comedi_buf_map_from_subdev_get(
-		struct comedi_subdevice *s);
+struct comedi_buf_map *
+comedi_buf_map_from_subdev_get(struct comedi_subdevice *s);
 unsigned int comedi_buf_write_n_available(struct comedi_subdevice *s);
 unsigned int comedi_buf_write_n_allocated(struct comedi_subdevice *s);
 void comedi_device_cancel_all(struct comedi_device *dev);