FIXUP: limit fetching to last 500 commits for checkpatch

Signed-off-by: David Heidelberg <david@ixit.cz>

Author: okias

.github/workflows/checkpatch.yml

@@ -5,7 +5,9 @@ jobs:
     name: checkpatch review
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 300
     - name: Run checkpatch review
       uses: webispy/checkpatch-action@master
       env: