npu2-opencapi: Make sure the PCI slot has the proper ID

The PCI slot created for the opencapi PHB didn't have its ID properly
defined because it was created before we assign an ID to the
PHB. Simply switch the PCI slot creation and PHB registration calls to
fix it.

Reviewed-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

hw/npu2-opencapi.c

@@ -1704,6 +1704,8 @@ static void setup_device(struct npu2_dev *dev)
 
 	set_fence_control(dev->npu->chip_id, dev->npu->xscom_base, dev->brick_index, 0b00);
 
+	pci_register_phb(&dev->phb_ocapi, OPAL_DYNAMIC_PHB_ID);
+
 	if (npu2_ocapi_training_state != NPU2_TRAIN_DEFAULT) {
 		setup_debug_training_state(dev);
 	} else {
@@ -1717,7 +1719,6 @@ static void setup_device(struct npu2_dev *dev)
 			prlog(PR_ERR, "OCAPI: Cannot create PHB slot\n");
 		}
 	}
-	pci_register_phb(&dev->phb_ocapi, OPAL_DYNAMIC_PHB_ID);
 	return;
 }