hw/phb3: fix error handling in complete reset

During a complete reset, when we get a timeout waiting for pending
transaction in state PHB3_STATE_CRESET_WAIT_CQ, we mark the PHB as
permanently broken.

Set the state to PHB3_STATE_FENCED so that the kernel can retry the
complete reset.

Reported-by: Pradipta Ghosh <pradghos@in.ibm.com>
Suggested-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

hw/phb3.c

@@ -2643,9 +2643,8 @@ static int64_t phb3_creset(struct pci_slot *slot)
 		       slot->state);
 	}
 
-	/* Mark the PHB as dead and expect it to be removed */
 error:
-	p->state = PHB3_STATE_BROKEN;
+	p->state = PHB3_STATE_FENCED;
 	return OPAL_HARDWARE;
 }