regulator: add missing description for set_over_current_protection

Over current protection is missing descriptions for documentation.

Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h
index 5d627c8..ad3e5158 100644
--- a/include/linux/regulator/machine.h
+++ b/include/linux/regulator/machine.h
@@ -97,6 +97,7 @@
  * @ramp_disable: Disable ramp delay when initialising or when setting voltage.
  * @soft_start: Enable soft start so that voltage ramps slowly.
  * @pull_down: Enable pull down when regulator is disabled.
+ * @over_current_protection: Auto disable on over current event.
  *
  * @input_uV: Input voltage for regulator when supplied by another regulator.
  *