target/hppa: Remove cond_free

target/hppa: Remove cond_free

Now that we do not need to free tcg temporaries, the only
thing cond_free does is reset the condition to never.
Instead, simply write a new condition over the old, which
may be simply cond_make_f() for the never condition.

The do_*_cond functions do the right thing with c or cf == 0,
so there's no need for a special case anymore.

Reviewed-by: Helge Deller <deller@gmx.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>