power: reset: syscon-reboot: Accept reg property

For historical reasons syscon-reboot has used an 'offset' property. As a
child on a MMIO bus having a 'reg' property is more appropriate. Accept
'reg' as an alternative to 'offset'.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241015225948.3971924-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Author: cpackham-atlnz

drivers/power/reset/syscon-reboot.c

@@ -61,7 +61,8 @@ static int syscon_reboot_probe(struct platform_device *pdev)
 		priority = 192;
 
 	if (of_property_read_u32(pdev->dev.of_node, "offset", &ctx->offset))
-		return -EINVAL;
+		if (of_property_read_u32(pdev->dev.of_node, "reg", &ctx->offset))
+			return -EINVAL;
 
 	value_err = of_property_read_u32(pdev->dev.of_node, "value", &ctx->value);
 	mask_err = of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask);