scd: For PIV cards used NO_AUTH instead of BAD_PIN.
* common/util.h (GPG_ERR_NO_AUTH, GPG_ERR_BAD_AUTH): Add replacement codes for gpgrt < 1.36. * scd/app-piv.c (auth_adm_key): (do_genkey, do_writecert): Use better error codes.
- Signed-off-by: Werner Koch <wk@gnupg.org>