PA-RISC uses procedure descriptors.  We'd need to emit a call to
the millicode routine $$dyncall.  However, this situation doesn't
actually arise, since we always have the descriptor available at
TCG code generation time.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>