Merge "feat(docs): allow verbose build" into integration

docs/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019-2020, ARM Limited. All rights reserved.
+# Copyright (c) 2019-2023, ARM Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -13,13 +13,20 @@ SPHINXPROJ    = TrustedFirmware-A
 SOURCEDIR     = .
 BUILDDIR      = build
 
+V ?= 0
+ifeq ($(V),0)
+  Q := @
+else
+  Q :=
+endif
+
 # Put it first so that "make" without argument is like "make help".
 help:
-	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	${Q}$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
 .PHONY: help Makefile
 
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
-	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	${Q}$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)