usb: gadget: s3c-hsotg: Fix invalid free of devm_ allocated data

Since hsotg object is allocated using devm_kzalloc() API, there is no
need to free this explicitly. But we need to keep the release API to
prevent warnings.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/s3c-hsotg.c

@@ -3477,12 +3477,11 @@ static void s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg)
 /**
  * s3c_hsotg_release - release callback for hsotg device
  * @dev: Device to for which release is called
+ *
+ * Nothing to do as the resource is allocated using devm_ API.
  */
 static void s3c_hsotg_release(struct device *dev)
 {
-	struct s3c_hsotg *hsotg = dev_get_drvdata(dev);
-
-	kfree(hsotg);
 }
 
 /**