hw/cxl: Pass NULL for a NULL MemoryRegionOps

a NULL parameter is enough for a NULL MemoryRegionOps

Reviewed-by: Fan Ni <fan.ni@samsung.com>
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20240126120132.24248-9-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/cxl/cxl-component-utils.c

@@ -197,7 +197,7 @@ void cxl_component_register_block_init(Object *obj,
                        CXL2_COMPONENT_BLOCK_SIZE);
 
     /* io registers controls link which we don't care about in QEMU */
-    memory_region_init_io(&cregs->io, obj, NULL, cregs, ".io",
+    memory_region_init_io(&cregs->io, obj, NULL, NULL, ".io",
                           CXL2_COMPONENT_IO_REGION_SIZE);
     memory_region_init_io(&cregs->cache_mem, obj, &cache_mem_ops, cxl_cstate,
                           ".cache_mem", CXL2_COMPONENT_CM_REGION_SIZE);