riscv: cpu-hotplug: clear cpu from numa map when teardown

There is numa_add_cpu() when cpus online, accordingly, there should be
numa_remove_cpu() when cpus offline.

Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
Fixes: 4f0e8ee ("riscv: Add numa support for riscv64 platform")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/kernel/cpu-hotplug.c

@@ -40,6 +40,7 @@ int __cpu_disable(void)
 		return ret;
 
 	remove_cpu_topology(cpu);
+	numa_remove_cpu(cpu);
 	set_cpu_online(cpu, false);
 	irq_migrate_all_off_this_cpu();