btrfs: block-group: don't set the wrong READA flag for btrfs_read_block_groups()

Regular block group items in extent tree are scattered inside the huge
tree, thus forward readahead makes no sense.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1 file changed