firmware: scmi: smccc transport: use plat data, not priv data

Change SCMI smccc transport drivers to use platform data rather
than private data for channel reference since it only stores platform
data retrieved from the DT. Consequently the probe handler is replaced
with a of_to_plat handler.

Cc: Simon Glass <sjg@chromium.org>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/drivers/firmware/scmi/smccc_agent.c b/drivers/firmware/scmi/smccc_agent.c
index f185891..f0477b9 100644
--- a/drivers/firmware/scmi/smccc_agent.c
+++ b/drivers/firmware/scmi/smccc_agent.c
@@ -32,7 +32,7 @@
 
 static int scmi_smccc_process_msg(struct udevice *dev, struct scmi_msg *msg)
 {
-	struct scmi_smccc_channel *chan = dev_get_priv(dev);
+	struct scmi_smccc_channel *chan = dev_get_plat(dev);
 	struct arm_smccc_res res;
 	int ret;
 
@@ -51,9 +51,9 @@
 	return ret;
 }
 
-static int scmi_smccc_probe(struct udevice *dev)
+static int scmi_smccc_of_to_plat(struct udevice *dev)
 {
-	struct scmi_smccc_channel *chan = dev_get_priv(dev);
+	struct scmi_smccc_channel *chan = dev_get_plat(dev);
 	u32 func_id;
 	int ret;
 
@@ -86,7 +86,7 @@
 	.name		= "scmi-over-smccc",
 	.id		= UCLASS_SCMI_AGENT,
 	.of_match	= scmi_smccc_ids,
-	.priv_auto	= sizeof(struct scmi_smccc_channel),
-	.probe		= scmi_smccc_probe,
+	.plat_auto	= sizeof(struct scmi_smccc_channel),
+	.of_to_plat	= scmi_smccc_of_to_plat,
 	.ops		= &scmi_smccc_ops,
 };