MIPS: Malta: Delete duplicate PCI fixup.

2ec8663f9c03a96f2c328c7c483603c31d62ad37 (lmo) rsp.
497e5ff0 (kernel.org) [MIPS: Malta: Move
PIIX4 PCI fixup to where it belongs.] attempted to move this PCI fixup
but really only added it at it's new location without deleting the old
instance.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>