hw/pci-bridge: Add a Kconfig switch for the normal PCI bridge

The pci-bridge device is not usable on s390x, so introduce a Kconfig
switch that allows to disable it.

Message-ID: <20240913144844.427899-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/pci-bridge/Kconfig

@@ -1,3 +1,8 @@
+config PCI_BRIDGE
+    bool
+    default y if PCI_DEVICES
+    depends on PCI
+
 config PCIE_PORT
     bool
     default y if PCI_DEVICES

hw/pci-bridge/meson.build

@@ -1,5 +1,5 @@
 pci_ss = ss.source_set()
-pci_ss.add(files('pci_bridge_dev.c'))
+pci_ss.add(when: 'CONFIG_PCI_BRIDGE', if_true: files('pci_bridge_dev.c'))
 pci_ss.add(when: 'CONFIG_I82801B11', if_true: files('i82801b11.c'))
 pci_ss.add(when: 'CONFIG_IOH3420', if_true: files('ioh3420.c'))
 pci_ss.add(when: 'CONFIG_PCIE_PORT', if_true: files('pcie_root_port.c', 'gen_pcie_root_port.c'))