Fixed typo

src/arch/i386/drivers/bus/pxebus.c

 	memcpy ( pxe->hwaddr, undi_info.PermNodeAddress,
 		 sizeof ( pxe->hwaddr ) );
 	pxe->irq = undi_info.IntNumber;
-	pxe->rom = undi_info.ROMAddress;
+	pxe->rom_segment = undi_info.ROMAddress;
 
 	return 0;
 }