binder: Modify comments

The function name should is binder_alloc_new_buf()
Signed-off-by: YangHui <yanghui.def@gmail.com>
Reviewed-by: Martijn Coenen <maco@android.com>
Link: https://lore.kernel.org/r/1597714444-3614-1-git-send-email-yanghui.def@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/android/binder_alloc.c

@@ -652,7 +652,7 @@ static void binder_free_buf_locked(struct binder_alloc *alloc,
  * @alloc:	binder_alloc for this proc
  * @buffer:	kernel pointer to buffer
  *
- * Free the buffer allocated via binder_alloc_new_buffer()
+ * Free the buffer allocated via binder_alloc_new_buf()
  */
 void binder_alloc_free_buf(struct binder_alloc *alloc,
 			    struct binder_buffer *buffer)