Add support for the built-in parallel port on SGI O2 (a.k.a.  IP32).
Define a new configuration option: PARPORT_IP32.  The module is named
parport_ip32.

Hardware support for SPP, EPP and ECP modes along with DMA support when
available are currently implemented.
Signed-off-by: Arnaud Giersch <arnaud.giersch@free.fr>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>