/net/hsr: fix misspellings using codespell tool

A typo is found out by codespell tool in 111th line of hsr_debugfs.c:

$ codespell ./net/hsr/

net/hsr/hsr_debugfs.c:111: Debufs  ==> Debugfs

Fix typos found by codespell.
Signed-off-by: Xiong Zhenwu <xiong.zhenwu@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/hsr/hsr_debugfs.c

@@ -108,7 +108,7 @@ void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
 /* hsr_debugfs_term - Tear down debugfs intrastructure
  *
  * Description:
- * When Debufs is configured this routine removes debugfs file system
+ * When Debugfs is configured this routine removes debugfs file system
  * elements that are specific to hsr
  */
 void