qapi pci: Elide redundant has_FOO in generated C

The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qapi/pci.json.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221018062849.3420573-18-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/pci/pci.c

@@ -1879,7 +1879,6 @@ static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus,
     info->class_info->q_class = class;
     desc = get_class_desc(class);
     if (desc->desc) {
-        info->class_info->has_desc = true;
         info->class_info->desc = g_strdup(desc->desc);
     }
 
@@ -1897,7 +1896,6 @@ static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus,
 
     type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
     if (type == PCI_HEADER_TYPE_BRIDGE) {
-        info->has_pci_bridge = true;
         info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num);
     } else if (type == PCI_HEADER_TYPE_NORMAL) {
         info->id->has_subsystem = info->id->has_subsystem_vendor = true;

monitor/hmp-cmds.c

@@ -730,7 +730,7 @@ static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)
                    dev->slot, dev->function);
     monitor_printf(mon, "    ");
 
-    if (dev->class_info->has_desc) {
+    if (dev->class_info->desc) {
         monitor_puts(mon, dev->class_info->desc);
     } else {
         monitor_printf(mon, "Class %04" PRId64, dev->class_info->q_class);
@@ -748,7 +748,7 @@ static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)
                        dev->irq, (char)('A' + dev->irq_pin - 1));
     }
 
-    if (dev->has_pci_bridge) {
+    if (dev->pci_bridge) {
         monitor_printf(mon, "      BUS %" PRId64 ".\n",
                        dev->pci_bridge->bus->number);
         monitor_printf(mon, "      secondary bus %" PRId64 ".\n",
@@ -794,7 +794,7 @@ static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)
 
     monitor_printf(mon, "      id \"%s\"\n", dev->qdev_id);
 
-    if (dev->has_pci_bridge) {
+    if (dev->pci_bridge) {
         if (dev->pci_bridge->has_devices) {
             PciDeviceInfoList *cdev;
             for (cdev = dev->pci_bridge->devices; cdev; cdev = cdev->next) {

scripts/qapi/schema.py

@@ -759,7 +759,6 @@ def need_has(self):
         assert self.type
         # Temporary hack to support dropping the has_FOO in reviewable chunks
         opt_out = [
-            'qapi/pci.json',
             'qapi/qdev.json',
             'qapi/qom.json',
             'qapi/replay.json',