soc/amd/cezanne/chip: add empty set_mmio_dev_ops

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I2ac5fcd17b6aed464a0d1e55f2860574501f7a8a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50439
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/amd/cezanne/chip.c

@@ -17,6 +17,10 @@ static struct device_operations pci_domain_ops = {
 	.scan_bus	= pci_domain_scan_bus,
 };
 
+static void set_mmio_dev_ops(struct device *dev)
+{
+}
+
 static void enable_dev(struct device *dev)
 {
 	/* Set the operations if it is a special bus type */
@@ -27,6 +31,9 @@ static void enable_dev(struct device *dev)
 	case DEVICE_PATH_CPU_CLUSTER:
 		dev->ops = &cpu_bus_ops;
 		break;
+	case DEVICE_PATH_MMIO:
+		set_mmio_dev_ops(dev);
+		break;
 	default:
 		break;
 	}