dt: submitting-patches: Document requirements for DT schema

Update the DT submitting-patches.txt with additional requirements for DT
binding schemas. New binding documents should generally use the schema
format and have an explicit license.

Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Rob Herring 2019-10-15 10:47:49 -05:00
commit 70145d16b3