mainboard/roda/rk9: transition away from device_t

Replace the use of the old device_t definition inside
mainboard/roda/rk9.

Change-Id: I56fec2a2814ee4b91b11f71dbdca1271792cd0e5
Signed-off-by: Antonello Dettori <dev@dettori.io>
Reviewed-on: https://review.coreboot.org/17302
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/roda/rk9/romstage.c

@@ -84,7 +84,7 @@ static void default_superio_gpio_setup(void)
 	   GP1 GP2 GP3 GP4
 	    fd  17  88  14
 	*/
-	const device_t sio = PNP_DEV(0x2e, 0);
+	const pnp_devfn_t sio = PNP_DEV(0x2e, 0);
 
 	/* Enter super-io's configuration state. */
 	pnp_enter_conf_state(sio);