hw/core/machine-smp: Fix error message parameter

In the loop checking smp cache support, the error message should report
the current cache level and type.

Fix the parameter of error_setg() to ensure it reports the correct cache
level and type.

Resolves: Coverity CID 1565391
Fixes: f35c0221fef8 ("hw/core: Check smp cache topology support for machine")
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/20241110150901.130647-3-zhao1.liu@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/core/machine-smp.c

@@ -317,7 +317,7 @@ bool machine_parse_smp_cache(MachineState *ms,
             !mc->smp_props.cache_supported[props->cache]) {
             error_setg(errp,
                        "%s cache topology not supported by this machine",
-                       CacheLevelAndType_str(node->value->cache));
+                       CacheLevelAndType_str(props->cache));
             return false;
         }