interconnect: qcom: icc-rpmh: Support child NoC device probe

As per e39bf2972c6e ("interconnect: icc-rpm: Support child NoC device
probe") also update the rpmh interconnect driver to support probing NoCs
that are modelled as child devices of a different NoC.

As the driver doesn't yet use the 'reg' property, no change is done for
that.

Downstream DT reference:
https://android.googlesource.com/kernel/msm-extra/devicetree/+/refs/tags/android-11.0.0_r0.56/qcom/lagoon-bus.dtsi

Signed-off-by: Luca Weiss <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Georgi Djakov <[e-mail]>

drivers/interconnect/qcom/icc-rpmh.c

···
 	data->num_nodes = num_nodes;
 	platform_set_drvdata(pdev, qp);
 
+	/* Populate child NoC devices if any */
+	if (of_get_child_count(dev->of_node) > 0)
+		return of_platform_populate(dev->of_node, NULL, NULL, dev);
+
 	return 0;
 err:
 	icc_nodes_remove(provider);