ARM: dts: qcom: add Glink SPMI debug controller device for Lahaina

Add a Glink SPMI debug controller device which can be used to
read and write PMIC registers over PMIC Glink using a remote
subsytem (e.g. DSP).

Change-Id: Ie17f008a20c938da96f3bb2f9e6100618fa4626a