dma-buf: remove useless FMODE_LSEEK flag

This is already set by anon_inode_getfile(), since dma_buf_fops has
non-NULL ->llseek, so we don't need to set it here too.
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/dma-buf/dma-buf.c

@@ -549,7 +549,6 @@ struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info)
 		goto err_dmabuf;
 	}
 
-	file->f_mode |= FMODE_LSEEK;
 	dmabuf->file = file;
 
 	mutex_init(&dmabuf->lock);