EDAC: Use edac_debugfs_remove_recursive() in edac_debugfs_exit()

debugfs_remove() is used to remove a file or a directory from the
debugfs filesystem on an EDAC device exit. However edac_debugfs might
not be empty. This is similar to

  30f84a89 ("EDAC: Use edac_debugfs_remove_recursive()")

which changed the EDAC MCI code to use edac_debugfs_remove_recursive().
Suggested-by: NBorislav Petkov <bp@alien8.de>
Signed-off-by: NThor Thayer <tthayer@opensource.altera.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1455064165-3816-1-git-send-email-tthayer@opensource.altera.comSigned-off-by: NBorislav Petkov <bp@suse.de>

drivers/edac/debugfs.c

@@ -53,7 +53,7 @@ int __init edac_debugfs_init(void)
 
 void edac_debugfs_exit(void)
 {
-	debugfs_remove(edac_debugfs);
+	debugfs_remove_recursive(edac_debugfs);
 }
 
 int edac_create_debugfs_nodes(struct mem_ctl_info *mci)