Fix bugs in serial port driver
Fix bugs in serial port driver

The definition of write_port changed which broke the serial port driver.

iankronquist/kernel-of-truth,iankronquist/kernel-of-truth,awensaunders/kernel-of-truth,iankronquist/kernel-of-truth,awensaunders/kernel-of-truth,iankronquist/kernel-of-truth,iankronquist/kernel-of-truth,awensaunders/kernel-of-truth