Edits needed for repo:voltha-docs use.

Support a named makefile target for license checking.

makefiles/lint/license/include.mk
makefiles/lint/license/reuse.mk
makefiles/lint/license/help.mk
makefiles/lint/license/install.mk
---------------------------------
  o Add reuse/license checking makefile targets.
  o repo:voltha-docs jobs perform compliance testing.

Change-Id: Ibb4a30a4b18017a8ff15cdd2bb92d1dc357a5de4
diff --git a/makefiles/lint/license/help.mk b/makefiles/lint/license/help.mk
new file mode 100644
index 0000000..ffd98bd
--- /dev/null
+++ b/makefiles/lint/license/help.mk
@@ -0,0 +1,48 @@
+# -*- makefile -*-
+# -----------------------------------------------------------------------
+# Copyright 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# -----------------------------------------------------------------------
+
+$(if $(DEBUG),$(warning ENTER))
+
+## -----------------------------------------------------------------------
+## Intent: Display topic help
+## -----------------------------------------------------------------------
+help-summary ::
+	@printf '  %-30s %s\n' 'lint-reuse'\
+      'License syntax check'
+	@printf '  %-30s %s\n' 'lint-reuse-help'\
+	  'Show verbose target help'
+	@printf '  %-30s %s\n' 'lint-license'\
+      'See target lint-reuse'
+  ifdef VERBOSE
+	@$(MAKE) --no-print-directory lint-reuse-help
+  endif
+
+## -----------------------------------------------------------------------
+## Intent: Display extended topic help
+## -----------------------------------------------------------------------
+.PHONY: lint-reuse-help
+lint-reuse-help ::
+	@printf '  %-30s %s\n' 'lint-reuse-all'\
+	  'License check available sources'
+	@printf '  %-30s %s\n' 'lint-reuse-mod'\
+	  'License check locally modified files (git status)'
+	@printf '  %-30s %s\n' 'lint-reuse-src'\
+	  'License check files by path'
+
+$(if $(DEBUG),$(warning LEAVE))
+
+# [EOF]