panfrost: use cpp_args instead of c_args for C++ files

c_args is not used for C++, so these were just being ignored. As far as
I know this was inconsequential. I doubt anybody is compiling panfrost
on msvc, and I didn't see any initializer override warnings.

Signed-off-by: Olivia Lee <olivia.lee@collabora.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35035>

src/panfrost/compiler/meson.build

@@ -170,7 +170,7 @@ if with_tests
         'valhall/test/test-merge-flow.cpp',
         'valhall/test/test-packing.cpp',
       ),
-      c_args : [c_msvc_compat_args, no_override_init_args],
+      cpp_args : [cpp_msvc_compat_args, no_override_init_args],
       gnu_symbol_visibility : 'hidden',
       include_directories : [inc_include, inc_src, inc_valhall],
       dependencies: [idep_gtest, idep_nir, idep_bi_opcodes_h, idep_bi_builder_h, idep_valhall_enums_h],

src/panfrost/lib/meson.build

@@ -118,7 +118,7 @@ if with_tests
         'tests/test-earlyzs.cpp',
         'tests/test-layout.cpp',
       ),
-      c_args : [c_msvc_compat_args, no_override_init_args],
+      cpp_args : [cpp_msvc_compat_args, no_override_init_args],
       gnu_symbol_visibility : 'hidden',
       include_directories : [inc_include, inc_src, inc_panfrost],
       dependencies: [idep_gtest, libpanfrost_dep],

src/panfrost/shared/meson.build

@@ -28,7 +28,7 @@ if with_tests
       files(
         'test/test-tiling.cpp',
       ),
-      c_args : [c_msvc_compat_args, no_override_init_args],
+      cpp_args : [cpp_msvc_compat_args, no_override_init_args],
       gnu_symbol_visibility : 'hidden',
       include_directories : [inc_include, inc_src, inc_panfrost],
       dependencies: [idep_gtest, idep_mesautil],