Documentation/process: fix self reference

Instead link to the device tree document with the same name.
Signed-off-by: Erik Ekman <erik@kryo.se>
Link: https://lore.kernel.org/r/20211119200758.642474-1-erik@kryo.seSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/process/submitting-patches.rst

@@ -14,7 +14,8 @@ works, see Documentation/process/development-process.rst. Also, read
 Documentation/process/submit-checklist.rst
 for a list of items to check before submitting code.  If you are submitting
 a driver, also read Documentation/process/submitting-drivers.rst; for device
-tree binding patches, read Documentation/process/submitting-patches.rst.
+tree binding patches, read
+Documentation/devicetree/bindings/submitting-patches.rst.
 
 This documentation assumes that you're using ``git`` to prepare your patches.
 If you're unfamiliar with ``git``, you would be well-advised to learn how to