regulator: Fix typo in of_get_regulator function comments

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index da9782b..edfa223 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -116,7 +116,7 @@
  * @supply: regulator supply name
  *
  * Extract the regulator device node corresponding to the supply name.
- * retruns the device node corresponding to the regulator if found, else
+ * returns the device node corresponding to the regulator if found, else
  * returns NULL.
  */
 static struct device_node *of_get_regulator(struct device *dev, const char *supply)