85xx/86xx: Move to dynamic mgmt of LAWs

85xx/86xx: Move to dynamic mgmt of LAWs

With the new LAW interface (set_next_law) we can move to letting the
system allocate which LAWs are used for what purpose.  This makes life
a bit easier going forward with the new DDR code.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Acked-by: Jon Loeliger <jdl@freescale.com>
Acked-by: Becky Bruce <becky.bruce@freescale.com>