f2fs: include seq_file.h for sysfs.c

This patch includes seq_file.h to avoid compile error.

Signed-off-by: Eric Biggers <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>

Author: Jaegeuk Kim

fs/f2fs/sysfs.c

@@ -11,6 +11,7 @@
  */
 #include <linux/proc_fs.h>
 #include <linux/f2fs_fs.h>
+#include <linux/seq_file.h>
 
 #include "f2fs.h"
 #include "segment.h"