platform: surface: Simplify with of_machine_get_match_data()

Replace open-coded getting root OF node, matching against it and getting
the match data with new of_machine_get_match_data() helper.

Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20251112-b4-of-match-matchine-data-v2-8-d46b72003fd6@linaro.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Author: krzk

drivers/platform/surface/surface_aggregator_registry.c

@@ -491,24 +491,13 @@ static const struct of_device_id ssam_platform_hub_of_match[] __maybe_unused = {
 static int ssam_platform_hub_probe(struct platform_device *pdev)
 {
 	const struct software_node **nodes;
-	const struct of_device_id *match;
-	struct device_node *fdt_root;
 	struct ssam_controller *ctrl;
 	struct fwnode_handle *root;
 	int status;
 
 	nodes = (const struct software_node **)acpi_device_get_match_data(&pdev->dev);
 	if (!nodes) {
-		fdt_root = of_find_node_by_path("/");
-		if (!fdt_root)
-			return -ENODEV;
-
-		match = of_match_node(ssam_platform_hub_of_match, fdt_root);
-		of_node_put(fdt_root);
-		if (!match)
-			return -ENODEV;
-
-		nodes = (const struct software_node **)match->data;
+		nodes = (const struct software_node **)of_machine_get_match_data(ssam_platform_hub_of_match);
 		if (!nodes)
 			return -ENODEV;
 	}