tty: Replace acpi_bus_get_device()

Replace acpi_bus_get_device() that is going to be dropped with
acpi_fetch_acpi_dev().

No intentional functional impact.

Reviewed-by: Jiri Slaby <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>
Link: https://lore.kernel.org/r/7355105.EvYhyI6sBW@kreacher
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/serdev/core.c

···
 static acpi_status acpi_serdev_add_device(acpi_handle handle, u32 level,
 					  void *data, void **return_value)
 {
+	struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
 	struct serdev_controller *ctrl = data;
-	struct acpi_device *adev;
 
-	if (acpi_bus_get_device(handle, &adev))
-		return AE_OK;
-
-	if (acpi_device_enumerated(adev))
+	if (!adev || acpi_device_enumerated(adev))
 		return AE_OK;
 
 	/* Skip if black listed */