Documentation: iio: fix a typo

Rename function name to the actual name referenced in
struct iio_sw_trigger_ops.

Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Link: https://lore.kernel.org/r/20200904091911.269715-1-poeschel@lemonage.de
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/iio/iio_configfs.rst b/Documentation/iio/iio_configfs.rst
index 6e38cbb..3a5d76f 100644
--- a/Documentation/iio/iio_configfs.rst
+++ b/Documentation/iio/iio_configfs.rst
@@ -53,7 +53,7 @@
 	 */
   }
 
-  static int iio_trig_hrtimer_remove(struct iio_sw_trigger *swt)
+  static int iio_trig_sample_remove(struct iio_sw_trigger *swt)
   {
 	/*
 	 * This undoes the actions in iio_trig_sample_probe