driver core: dev_set_drvdata returns void

dev_set_drvdata can no longer fail, so it could return void.

All callers have hopefully been updated to no longer check for the
return value.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/dd.c

@@ -600,9 +600,8 @@ void *dev_get_drvdata(const struct device *dev)
 }
 EXPORT_SYMBOL(dev_get_drvdata);
 
-int dev_set_drvdata(struct device *dev, void *data)
+void dev_set_drvdata(struct device *dev, void *data)
 {
 	dev->driver_data = data;
-	return 0;
 }
 EXPORT_SYMBOL(dev_set_drvdata);

include/linux/device.h

@@ -911,7 +911,7 @@ extern const char *device_get_devnode(struct device *dev,
 				      umode_t *mode, kuid_t *uid, kgid_t *gid,
 				      const char **tmp);
 extern void *dev_get_drvdata(const struct device *dev);
-extern int dev_set_drvdata(struct device *dev, void *data);
+extern void dev_set_drvdata(struct device *dev, void *data);
 
 static inline bool device_supports_offline(struct device *dev)
 {