dt-bindings: qcom: Add ipq6018 bindings

dt-bindings: qcom: Add ipq6018 bindings

Document the new ipq6018 SOC/board device tree bindings.

Co-developed-by: Selvam Sathappan Periakaruppan <speriaka@codeaurora.org>
Signed-off-by: Selvam Sathappan Periakaruppan <speriaka@codeaurora.org>
Co-developed-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Link: https://lore.kernel.org/r/1579439601-14810-4-git-send-email-sricharan@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>