powerpc/mpc85xx: remove the unneeded pci init functions for corenet ds board

The function pci_devs_phb_init is invoked more earlier than we really
probe the pci controller, so it does nothing at all. And we also don't
need the pci_dn stuff for the fsl powerpc64 boards, just remove it.

It also seems that we don't support ISA on all the current corenet ds
boards. So picking a primary bus seems useless, remove that function
too.
Signed-off-by: Kevin Hao <haokexin@gmail.com>

arch/powerpc/platforms/85xx/corenet_ds.c

@@ -53,12 +53,6 @@ void __init corenet_ds_setup_arch(void)
 {
 	mpc85xx_smp_init();
 
-#if defined(CONFIG_PCI) && defined(CONFIG_PPC64)
-	pci_devs_phb_init();
-#endif
-
-	fsl_pci_assign_primary();
-
 	swiotlb_detect_4g();
 
 	pr_info("%s board from Freescale Semiconductor\n", ppc_md.name);