btrfs: flag files as supporting buffered async reads

btrfs uses generic_file_read_iter(), which already supports this.

Acked-by: Chris Mason <clm@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-05-22 10:19:22 -06:00
commit 8730f12b79