target/hppa: Rename cond_make_* helpers

target/hppa: Rename cond_make_* helpers

Use 'v' for a variable that needs copying, 't' for a temp that
doesn't need copying, and 'i' for an immediate, and use this
naming for both arguments of the comparison.  So:

   cond_make_tmp -> cond_make_tt
   cond_make_0_tmp -> cond_make_ti
   cond_make_0 -> cond_make_vi
   cond_make -> cond_make_vv

Pass 0 explictly, rather than implicitly in the function name.

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