rpmsg: char: Simplify 'rpmsg_eptdev_release()'

Use 'skb_queue_purge()' instead of re-implementing it.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/rpmsg/rpmsg_char.c

@@ -146,7 +146,6 @@ static int rpmsg_eptdev_release(struct inode *inode, struct file *filp)
 {
 	struct rpmsg_eptdev *eptdev = cdev_to_eptdev(inode->i_cdev);
 	struct device *dev = &eptdev->dev;
-	struct sk_buff *skb;
 
 	/* Close the endpoint, if it's not already destroyed by the parent */
 	mutex_lock(&eptdev->ept_lock);
@@ -157,10 +156,7 @@ static int rpmsg_eptdev_release(struct inode *inode, struct file *filp)
 	mutex_unlock(&eptdev->ept_lock);
 
 	/* Discard all SKBs */
-	while (!skb_queue_empty(&eptdev->queue)) {
-		skb = skb_dequeue(&eptdev->queue);
-		kfree_skb(skb);
-	}
+	skb_queue_purge(&eptdev->queue);
 
 	put_device(dev);