ci: Run clang-format on panfrost

So we don't regress formatting in the future. This should never really trigger
if people configure their editors correctly, but it can help avoid regressing
the formatting from drive-by patches.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22372>

.gitlab-ci/test-source-dep.yml

@@ -985,4 +985,5 @@
     - !reference [.core-rules, rules]
     - changes:
       - src/**/asahi/**/*
+      - src/**/panfrost/**/*
       when: on_success

.gitlab-ci/test/gitlab-ci.yml

@@ -41,7 +41,7 @@ clang-format:
     GIT_STRATEGY: fetch
   script:
     - shopt -s globstar
-    - clang-format-13 --Werror --dry-run src/**/asahi/**/*.{h,c,cpp}
+    - clang-format-13 --Werror --dry-run src/**/{asahi,panfrost}/**/*.{h,c,cpp}
 
 .test-gl:
   extends: