[PATCH 4/4] pinctrl: pinctrl-zynqmp: Fix kernel-doc warning

[Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xxxxxxxxxx>]

Fix the below kernel-doc warning by adding the description for return
value.
"warning: No description found for return value of
'zynqmp_pmux_get_function_groups'".

Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xxxxxxxxxx>
---
 drivers/pinctrl/pinctrl-zynqmp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c
index b25e9e76fbf8..7d2fbf8a02cd 100644
--- a/drivers/pinctrl/pinctrl-zynqmp.c
+++ b/drivers/pinctrl/pinctrl-zynqmp.c
@@ -163,6 +163,8 @@ static const char *zynqmp_pmux_get_function_name(struct pinctrl_dev *pctldev,
  * @num_groups:	Number of function groups.
  *
  * Get function's group count and group names.
+ *
+ * Return: 0
  */
 static int zynqmp_pmux_get_function_groups(struct pinctrl_dev *pctldev,
 					   unsigned int selector,
-- 
2.17.1