tcg/mips: Remove ALIAS_PADD, ALIAS_PADDI These aliases existed to simplify code for O32 and N32. Now that the 64-bit abi is the only one supported, we can use the DADD* instructions directly. Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>