arm64: Kconfig: Enable HOTPLUG_SMT

kunpeng inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8TAPW
CVE: NA

Reference: https://lore.kernel.org/all/20231121092602.47792-1-yangyicong@huawei.com/



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Enable HOTPLUG_SMT for SMT control.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Jie Liu <liujie375@h-partners.com>