ACPI: EC: Register a platform device for ECDT EC

To facilitate converting the ACPI EC driver into a platform one,
modify acpi_bus_register_early_device(), used by acpi_ec_ecdt_start()
for creating a struct acpi_device to represent the "early" EC based
on the ECDT ACPI table, to carry out the default ACPI enumeration for
the given device which will cause a platform device to be registered
for it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2397353.ElGaqSPkdT@rafael.j.wysocki

Author: rafaeljw

drivers/acpi/scan.c

@@ -2754,6 +2754,8 @@ int acpi_bus_register_early_device(int type)
 	if (result)
 		return result;
 
+	acpi_default_enumeration(device);
+
 	device->flags.match_driver = true;
 	return device_attach(&device->dev);
 }