MAINTAINERS: add entries for some documentation scripts

There are some documentation scripts I wrote with doesn't
have any maintainer at maintainer's file.

Add them to the DOCUMENTATION entry, in order to have
Jon and linux-doc ML c/c on those patches, plus a new
entry to ensure that I'll be c/c when people send patches
to those.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

MAINTAINERS

@@ -4947,7 +4947,9 @@ M:	Jonathan Corbet <corbet@lwn.net>
 L:	linux-doc@vger.kernel.org
 S:	Maintained
 F:	Documentation/
+F:	scripts/documentation-file-ref-check
 F:	scripts/kernel-doc
+F:	scripts/sphinx-pre-install
 X:	Documentation/ABI/
 X:	Documentation/firmware-guide/acpi/
 X:	Documentation/devicetree/
@@ -4963,6 +4965,14 @@ L:	linux-doc@vger.kernel.org
 S:	Maintained
 F:	Documentation/translations/it_IT
 
+DOCUMENTATION SCRIPTS
+M:	Mauro Carvalho Chehab <mchehab@kernel.org>
+L:	linux-doc@vger.kernel.org
+S:	Maintained
+F:	scripts/documentation-file-ref-check
+F:	scripts/sphinx-pre-install
+F:	Documentation/sphinx/parse-headers.pl
+
 DONGWOON DW9714 LENS VOICE COIL DRIVER
 M:	Sakari Ailus <sakari.ailus@linux.intel.com>
 L:	linux-media@vger.kernel.org