Beech/405LP PCMCIA support

This patch adds support for the PCMCIA slot on the 405LP Beech board.
Could someone please apply it to linuxppc_2_4_devel (again, I would,
but I don't want to break the tree again).

--
David Gibson			| For every complex problem there is a
david@gibson.dropbear.id.au	| solution which is simple, neat and
				| wrong.
http://www.ozlabs.org/people/dgibson