powerpc/powernv: Fix early pci_controller_ops loading.

Load the PowerNV platform pci controller ops into pci controllers
after all the operations are loaded into the platform ops struct, not
before.

Otherwise we aren't actually setting the ops properly which can break
IO for some devices.

Fixes: 65ebf4b6 ("powerpc/powernv: Move controller ops from ppc_md to controller_ops")
Reported-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/powernv/pci-ioda.c

@@ -2693,7 +2693,6 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
 		hose->last_busno = 0xff;
 	}
 	hose->private_data = phb;
-	hose->controller_ops = pnv_pci_controller_ops;
 	phb->hub_id = hub_id;
 	phb->opal_id = phb_id;
 	phb->type = ioda_type;
@@ -2812,6 +2811,7 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
 	pnv_pci_controller_ops.enable_device_hook = pnv_pci_enable_device_hook;
 	pnv_pci_controller_ops.window_alignment = pnv_pci_window_alignment;
 	pnv_pci_controller_ops.reset_secondary_bus = pnv_pci_reset_secondary_bus;
+	hose->controller_ops = pnv_pci_controller_ops;
 
 #ifdef CONFIG_PCI_IOV
 	ppc_md.pcibios_fixup_sriov = pnv_pci_ioda_fixup_iov_resources;