Added the driver to the 2.5 tree.  The original code for 2.4 was
written by Pei Liu <pbl@cypress.com> but cleaned up a bit and 
ported to 2.5 by me.  Any problems in the driver is probably due to
my messing with it.

This driver is for the SL811HS USB host controller chip from
Cypress and is typically contained on a ARM based embedded
system.