hw/pci-bridge: Constify VMState

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231221031652.119827-46-richard.henderson@linaro.org>
diff --git a/hw/pci-bridge/xio3130_downstream.c b/hw/pci-bridge/xio3130_downstream.c
index 38a2361..907d510 100644
--- a/hw/pci-bridge/xio3130_downstream.c
+++ b/hw/pci-bridge/xio3130_downstream.c
@@ -146,7 +146,7 @@
     .version_id = 1,
     .minimum_version_id = 1,
     .post_load = pcie_cap_slot_post_load,
-    .fields = (VMStateField[]) {
+    .fields = (const VMStateField[]) {
         VMSTATE_PCI_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),