dt-bindings: remoteproc: qcom: Add Q6V5 Modem PIL binding for SC7180

Add a new modem compatible string for Qualcomm SC7180 SoCs and introduce
the "qcom,halt-nav-regs" bindings needed by the modem sub-system running
on SC7180 SoCs.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Link: https://lore.kernel.org/r/20191219054506.20565-2-sibis@codeaurora.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>