hw/misc: Constify VMState

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231221031652.119827-41-richard.henderson@linaro.org>
diff --git a/hw/misc/a9scu.c b/hw/misc/a9scu.c
index a375ebc..04225df 100644
--- a/hw/misc/a9scu.c
+++ b/hw/misc/a9scu.c
@@ -116,7 +116,7 @@
     .name = "a9-scu",
     .version_id = 1,
     .minimum_version_id = 1,
-    .fields = (VMStateField[]) {
+    .fields = (const VMStateField[]) {
         VMSTATE_UINT32(control, A9SCUState),
         VMSTATE_UINT32(status, A9SCUState),
         VMSTATE_END_OF_LIST()