UBIFS: kernel-doc warning fix

s/data/timer

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c
index 2290d58..fb08b0c 100644
--- a/fs/ubifs/io.c
+++ b/fs/ubifs/io.c
@@ -431,7 +431,7 @@
 
 /**
  * wbuf_timer_callback - write-buffer timer callback function.
- * @data: timer data (write-buffer descriptor)
+ * @timer: timer data (write-buffer descriptor)
  *
  * This function is called when the write-buffer timer expires.
  */