- Remove the const that someone incorrectly stuck in there, it type conflicts.
   Alan has a better plan for fixing this long term, but this fixes the compile
   warning for now.

 - Move the printk of the xquad_portio setup *after* we put something in the variable
   so it actually prints something useful, not 0 ;-)

 - To derive the size of the xquad_portio area, multiply the number of nodes by the
   size of each nodes, not the size of two nodes (and remove define). Doh!