ci/vc4: rename stage to Broadcom

It fits better with what other drivers has done.

Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Acked-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8702>

.gitlab-ci.yml

@@ -28,8 +28,8 @@ stages:
   - build-misc
   - amd
   - arm
+  - broadcom
   - freedreno
-  - raspberrypi
   - software-renderer
   - layered-backends
   - deploy

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

@@ -150,7 +150,7 @@
     - when: never
 
 .vc4-rules:
-  stage: raspberrypi
+  stage: broadcom
   rules:
     - *ignore_scheduled_pipelines
     - changes: