[PATCH] pinctrl: mcp23s08: add module license

[Jason Yan]

Fix the following build warning:

WARNING: modpost: missing MODULE_LICENSE() in
drivers/pinctrl/pinctrl-mcp23s08.o
see include/linux/module.h for more information

Signed-off-by: Jason Yan <yanaijie@xxxxxxxxxx>
---
 drivers/pinctrl/pinctrl-mcp23s08.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c
index cb545557dcd4..151931b593f6 100644
--- a/drivers/pinctrl/pinctrl-mcp23s08.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08.c
@@ -658,3 +658,4 @@ int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
 	return ret;
 }
 EXPORT_SYMBOL_GPL(mcp23s08_probe_one);
+MODULE_LICENSE("GPL");
-- 
2.21.1