btrfs: relocation: use enum for stages

Add an enum type for data relocation stages.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2023-09-22 13:07:16 +02:00
commit 8daf07cf2b