s/info_migrate_capabilities/info migrate_capabilities

Signed-off-by: Wei Jiangang <weijg.fnst@cn.fujitsu.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Liang Li <liang.z.li@intel.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>