CI: Add deviceinfo linting via dint

Needs https://gitlab.postmarketos.org/postmarketOS/pmbootstrap/-/merge_requests/2679
to run locally.

Tested and works locally with 'pmbootstrap ci' as well as in GitLab CI.

Closes https://gitlab.postmarketos.org/postmarketOS/pmaports/-/issues/2583

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7006>

.gitlab-ci.yml

@@ -101,6 +101,19 @@ aport-lint:
     - .ci/apkbuild-lint.sh
   allow_failure: true
 
+# deviceinfo linting
+dint:
+  stage: lint
+  rules:
+    - if: *mr_rule
+      changes:
+        - .ci/**/*
+        - .gitlab-ci.yml
+        - device/*/device-*/deviceinfo
+  script:
+    - .ci/lib/gitlab_prepare_ci.sh
+    - .ci/dint.sh
+
 # kernel kconfig check
 kernel-kconfig:
   stage: lint