docs/s390: Fix wrong command example in s390-cpu-topology.rst

From s390_possible_cpu_arch_ids() in hw/s390x/s390-virtio-ccw.c, the
"core-id" is the index of possible_cpus->cpus[], so it should only be
less than possible_cpus->len, which is equal to ms->smp.max_cpus.

Fix the wrong "core-id" 112, because it isn't less than maxcpus (36) in
-smp, and the valid core ids are 0-35 inclusive.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Message-ID: <20231127134917.568552-1-zhao1.liu@linux.intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

docs/devel/s390-cpu-topology.rst

@@ -15,7 +15,7 @@ have default values:
     -smp 1,drawers=3,books=3,sockets=2,cores=2,maxcpus=36 \
     -device z14-s390x-cpu,core-id=19,entitlement=high \
     -device z14-s390x-cpu,core-id=11,entitlement=low \
-    -device z14-s390x-cpu,core-id=112,entitlement=high \
+    -device z14-s390x-cpu,core-id=12,entitlement=high \
    ...
 
 Additions to query-cpus-fast
@@ -78,15 +78,15 @@ modifiers for all configured vCPUs.
       "dedicated": true,
       "thread-id": 537005,
       "props": {
-        "core-id": 112,
+        "core-id": 12,
         "socket-id": 0,
         "drawer-id": 3,
         "book-id": 2
       },
       "cpu-state": "operating",
       "entitlement": "high",
       "qom-path": "/machine/peripheral-anon/device[2]",
-      "cpu-index": 112,
+      "cpu-index": 12,
       "target": "s390x"
     }
   ]