tcg/ppc64: Rename from ppc

Emphasize that we're generating 64-bit code.
Drop the explicit rename from meson's cpu.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

MAINTAINERS

@@ -4079,7 +4079,7 @@ F: tcg/mips/
 PPC TCG target
 M: Richard Henderson <richard.henderson@linaro.org>
 S: Odd Fixes
-F: tcg/ppc/
+F: tcg/ppc64/
 
 RISC-V TCG target
 M: Palmer Dabbelt <palmer@dabbelt.com>

meson.build

@@ -907,8 +907,6 @@ if have_tcg
   endif
   if get_option('tcg_interpreter')
     tcg_arch = 'tci'
-  elif host_arch == 'ppc64'
-    tcg_arch = 'ppc'
   endif
   add_project_arguments('-iquote', meson.current_source_dir() / 'tcg' / tcg_arch,
                         language: all_languages)