[PATCH v3 09/12] docs: dt: minor adjustments at writing-schema.rst

[Mauro Carvalho Chehab]

There are two literal blocks that aren't mark as such. Mark them,
in order to make the document to produce a better html output.

While here, also add a SPDX header to it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
 Documentation/devicetree/writing-schema.rst | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/writing-schema.rst b/Documentation/devicetree/writing-schema.rst
index 220cf464ed77..8c74a99f95e2 100644
--- a/Documentation/devicetree/writing-schema.rst
+++ b/Documentation/devicetree/writing-schema.rst
@@ -1,4 +1,4 @@
-:orphan:
+.. SPDX-License-Identifier: GPL-2.0
 
 Writing DeviceTree Bindings in json-schema
 ==========================================
@@ -124,9 +124,12 @@ dtc must also be built with YAML output support enabled. This requires that
 libyaml and its headers be installed on the host system. For some distributions
 that involves installing the development package, such as:
 
-Debian:
+Debian::
+
   apt-get install libyaml-dev
-Fedora:
+
+Fedora::
+
   dnf -y install libyaml-devel
 
 Running checks
-- 
2.25.2