gitlab/azure: Use buildman instead of genboardscfg

Use the equivalent buildman functionality to check maintainer info.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index bc2b437..36ca3cb 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -140,7 +140,7 @@
       options: $(container_option)
     steps:
       - script: |
-          if [ `./tools/genboardscfg.py -f 2>&1 | wc -l` -ne 0 ]; then exit 1; fi
+          ./tools/buildman/buildman -R
 
   - job: tools_only
     displayName: 'Ensure host tools build'