btrfs: move check for device generation to the last

No functional changes. This helps to move the entire section into
a new function.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2017-11-09 23:45:25 +08:00 • committed by David Sterba
commit 9f050db43e