Btrfs: don't use src fd for printk

Btrfs: don't use src fd for printk

Orabug: 25308088

[ Upstream commit c79b4713304f812d3d6c95826fc3e5fc2c0b0c14 ]

The fd we pass in may not be on a btrfs file system, so don't try to do
BTRFS_I() on it.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
(cherry picked from commit ec2744d3c8e70f1beedeaa361dd8b162017a12e7)
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>