arm64: Add some definitions of kvm_para*

hulk inclusion
category: feature
bugzilla: 47727
CVE: NA

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Currently, ARM does not support kvm_para* of KVM_GUEST. We provide
some definitions of kvm_para* functions, although it is only a
simple return.

Signed-off-by: Xiangyou Xie <xiexiangyou@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>