Staging: iio: lots of doc fixes

Fix iio header files kernel-doc notation errors, spelling, typos,
indentation, grammar, etc.

It would also be good if these function names were spelled
correctly, but I didn't change them:
  iio_push_or_escallate_ring_event()
  iio_trigger_dettach_poll_func()

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/trigger_consumer.h b/drivers/staging/iio/trigger_consumer.h
index 4c7f527..a02d70b 100644
--- a/drivers/staging/iio/trigger_consumer.h
+++ b/drivers/staging/iio/trigger_consumer.h
@@ -10,12 +10,13 @@
 
 #ifdef CONFIG_IIO_TRIGGER
 /**
- * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers.
+ * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
  * @dev_info: iio_dev associated with the device that will consume the trigger
  **/
 int iio_device_register_trigger_consumer(struct iio_dev *dev_info);
+
 /**
- * iio_device_unregister_trigger_consumer() - reverse the registration process.
+ * iio_device_unregister_trigger_consumer() - reverse the registration process
  * @dev_info: iio_dev associated with the device that consumed the trigger
  **/
 int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info);
@@ -23,13 +24,14 @@
 #else
 
 /**
- * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers.
+ * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
  * @dev_info: iio_dev associated with the device that will consume the trigger
  **/
 int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
 {
 	return 0;
 };
+
 /**
  * iio_device_unregister_trigger_consumer() - reverse the registration process
  * @dev_info: iio_dev associated with the device that consumed the trigger