btrfs: tree-checker: Make btrfs_check_chunk_valid() return EUCLEAN instead of EIO

btrfs: tree-checker: Make btrfs_check_chunk_valid() return EUCLEAN instead of EIO

commit bf871c3b43b1dcc3f2a076ff39a8f1ce7959d958 upstream.

To follow the standard behavior of tree-checker.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Cherry-picked for 4.19 to ease backporting later fixes]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>