dt-bindings: mailbox: Add devicetree binding for Qcom IPCC

Add devicetree YAML binding for Qualcomm Inter-Processor Communication
Controller (IPCC) block.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
2 files changed