.github: Don't run second stage on pull_request

Only run the second build stage on tracked branches.
The second build stage generate artifacts intended to be deployed on
hardware and include all drivers, hence the longer build times.

Signed-off-by: Jorge Marques <[email protected]>

Author: gastmaier

.github/workflows/top-level.yml

@@ -91,8 +91,7 @@ jobs:
           assert_labels
   conditional_xlnx:
     if: |
-      (github.event_name == 'push' && startsWith(github.ref_name, 'ci/') || github.ref_name == 'main') ||
-      (github.event_name == 'pull_request' && startsWith(github.base_ref, 'ci/') || github.ref_name == 'main')
+      (github.event_name == 'push' && startsWith(github.ref_name, 'ci/') || github.ref_name == 'main')
     runs-on: [self-hosted, v1]
     needs: [assert_checks]
     steps:
@@ -206,8 +205,7 @@ jobs:
           assert_labels
   conditional_rpi:
     if: |
-      (github.event_name == 'push' && startsWith(github.ref_name, 'rpi-')) ||
-      (github.event_name == 'pull_request' && startsWith(github.base_ref, 'rpi-'))
+      (github.event_name == 'push' && startsWith(github.ref_name, 'rpi-'))
     runs-on: [self-hosted, v1]
     needs: [assert_checks]
     steps: