checkpatch: DT bindings should be a separate patch [robh@kernel.org: add doc pointer to warning, simplify... ...kernel.org/r/20180810170513.26284-1-robh@kernel.org [robh@kernel.org: v3] ...kernel.org/r/20180810225049.20452-1-robh@kernel.org ...kernel.org/r/20180809205032.22205-1-robh@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>