hw/pci: remove all references to find_i440fx function

commit c0e427d6eb ("hw/acpi/ich9: Enable ACPI PCI hot-plug") removed all
uses of find_i440fx() function. This has been replaced by the more generic call
acpi_get_i386_pci_host() which maybe able to find the root bus both for i440fx
machine type as well as for the q35 machine type. There seems to be no more any
need to maintain a i440fx specific version of the api call. Remove it.

Tested by building from a clean tree successfully.

Signed-off-by: Ani Sinha <ani@anisinha.ca>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210825031949.919376-2-ani@anisinha.ca>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/pci-host/i440fx.c

@@ -314,12 +314,6 @@ PCIBus *i440fx_init(const char *host_type, const char *pci_type,
     return b;
 }
 
-PCIBus *find_i440fx(void)
-{
-    PCIHostState *s = PCI_HOST_BRIDGE(object_resolve_path("/machine/i440fx", NULL));
-    return s ? s->bus : NULL;
-}
-
 static void i440fx_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);

include/hw/pci-host/i440fx.h

@@ -45,6 +45,5 @@ PCIBus *i440fx_init(const char *host_type, const char *pci_type,
                     MemoryRegion *pci_memory,
                     MemoryRegion *ram_memory);
 
-PCIBus *find_i440fx(void);
 
 #endif

stubs/meson.build

@@ -26,7 +26,6 @@ stub_ss.add(files('module-opts.c'))
 stub_ss.add(files('monitor.c'))
 stub_ss.add(files('monitor-core.c'))
 stub_ss.add(files('pci-bus.c'))
-stub_ss.add(files('pci-host-piix.c'))
 stub_ss.add(files('qemu-timer-notify-cb.c'))
 stub_ss.add(files('qmp_memory_device.c'))
 stub_ss.add(files('qmp-command-available.c'))

stubs/pci-host-piix.c

@@ -1,7 +0,0 @@
-#include "qemu/osdep.h"
-#include "hw/pci-host/i440fx.h"
-
-PCIBus *find_i440fx(void)
-{
-    return NULL;
-}