hw/riscv: Fix typo field in error_report

"smp.cpus" means the number of online CPUs and "smp.max_cpus" means the
total number of CPUs.

riscv_numa_get_default_cpu_node_id() checks "smp.cpus" and the
"available CPUs" description in the next error message also indicates
online CPUs.

So report "smp.cpus" in error_report() instand of "smp.max_cpus".

Since "smp.cpus" is "unsigned int", use "%u".

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230718080712.503333-1-zhao1.liu@linux.intel.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

hw/riscv/numa.c

@@ -209,8 +209,8 @@ int64_t riscv_numa_get_default_cpu_node_id(const MachineState *ms, int idx)
 
     if (ms->numa_state->num_nodes > ms->smp.cpus) {
         error_report("Number of NUMA nodes (%d)"
-                     " cannot exceed the number of available CPUs (%d).",
-                     ms->numa_state->num_nodes, ms->smp.max_cpus);
+                     " cannot exceed the number of available CPUs (%u).",
+                     ms->numa_state->num_nodes, ms->smp.cpus);
         exit(EXIT_FAILURE);
     }
     if (ms->numa_state->num_nodes) {