This device doesn't have fields to migrate. Be explicit
by using vmstate_qdev_no_state_to_migrate.

Add a more descriptive comment to keep a clear separation
between static property vs runtime changeable.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/intc/arm_gicv2m.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/intc/arm_gicv2m.c b/hw/intc/arm_gicv2m.c
index 0b7e2b4f84..c8b066066b 100644
--- a/hw/intc/arm_gicv2m.c
+++ b/hw/intc/arm_gicv2m.c
@@ -54,6 +54,7 @@ typedef struct ARMGICv2mState {
     MemoryRegion iomem;
     qemu_irq spi[GICV2M_NUM_SPI_MAX];
 
+    /* Properties */
     uint32_t base_spi;
     uint32_t num_spi;
 } ARMGICv2mState;
@@ -181,6 +182,7 @@ static void gicv2m_class_init(ObjectClass *klass, void *data)
 
     device_class_set_props(dc, gicv2m_properties);
     dc->realize = gicv2m_realize;
+    dc->vmsd = vmstate_qdev_no_state_to_migrate;
 }
 
 static const TypeInfo gicv2m_info = {
-- 
2.21.3