sw64: kvm: fix wrong info print of KVM_MEMHOTPLUG

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56WV8



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Due to the registration of guest IO address, there is wrong
pr_info of "KVM MEMHOTPLUG support" when booting the guest,
so we fix it.

Signed-off-by: Min Fanlei <minfanlei@wxiat.com>
Signed-off-by: Gu Zitao <guzitao@wxiat.com>