powerpc/t4240: set pcie liodn in the correct register

The liodn for the T4240's PCIE controller is no longer set
through a register in the guts register block but with one
in the PCIE register block itself.
Use the already existing SET_PCI_LIODN_BASE macro that puts
the liodn in the correct register.

Signed-off-by: Laurentiu Tudor <Laurentiu.Tudor@freescale.com>
Cc: Scott Wood <scottwood@freescale.com>
Cc: York Sun <yorksun@freescale.com>