Better printk

[James S. <jsi...@tr...>]

Hi folks!!

   Just to let you know printk has been reworked again. This time I
removed struct tty_driver from struct console. It was to heavy and I
realized both the console layer and the tty layer shared something inc
ommon, kdev_t. So it now uses the kdev_t feild instead. This now means 
register_console can handle setting up all the ahndling issues on its own
without the drivers help. This was a problem before and I had lots of fun
with serial console on the iPAQ because of this. Now it is fixed. The next
step is now to cleanup the register_tty_driver stuff. That needs to be
done be VT instead for all 64 VCs.