CI: Test for unmigrated CONFIG symbols in board config.h files

Now that all symbols that exist in Kconfig no longer also have boards
setting them  in the board config.h file, add a CI test to catch new
instances of this, and fail.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4c89dae..d06cca4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -105,6 +105,27 @@
         exit $ret;
       fi;
 
+check for migrated symbols in board header:
+  stage: testsuites
+  script:
+    - KSYMLST=`mktemp`;
+      KUSEDLST=`mktemp`;
+      cat `find . -name "Kconfig*"` |
+         sed -n -e 's/^\s*config *\([A-Za-z0-9_]*\).*$/CONFIG_\1/p'
+         -e 's/^\s*menuconfig *\([A-Za-z0-9_]*\).*$/CONFIG_\1/p'
+         | sort -u > $KSYMLST;
+      for CFG in `find include/configs -name "*.h"`; do
+         grep '#define[[:blank:]]CONFIG_' $CFG |
+            sed -n 's/#define.\(CONFIG_[A-Za-z0-9_]*\).*/\1/p' |
+            sort -u > ${KUSEDLST} || true;
+         NUM=`comm -12 --total --output-delimiter=, ${KSYMLST} ${KUSEDLST} |
+            cut -d , -f 3`;
+         if [[ $NUM -ne 0 ]]; then
+            echo "Unmigrated symbols found in $CFG";
+            exit 1;
+         fi;
+      done
+
 # QA jobs for code analytics
 # static code analysis with cppcheck (we can add --enable=all later)
 cppcheck: