cifs: use protocol specific call for query_mf_symlink()

We have an existing protocol specific call query_mf_symlink() created
for check_mf_symlink which can also be used for query_mf_symlink().

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>