mainboard/iei/pm-lx2-800-r10: transition away from device_t

Replace the use of the old device_t definition inside
mainboard/iei/pm-lx2-800-r10.

Change-Id: I60e5b84141aa4998427c3ecaadf8fce1654b8210
Signed-off-by: Antonello Dettori <dev@dettori.io>
Reviewed-on: https://review.coreboot.org/17295
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/iei/pm-lx2-800-r10/romstage.c

@@ -64,7 +64,7 @@ void main(unsigned long bist)
 	console_init();
 
 	/* Enable COM3. */
-	device_t dev = 	PNP_DEV(0x2e, 0x0b);
+	pnp_devfn_t dev = PNP_DEV(0x2e, 0x0b);
 	u16 port = dev >> 8;
 	outb(0x55, port);
 	pnp_set_logical_device(dev);