Add the compilation option CONFIG_KVM while using
"kvm_arm_cpu_feature_supported" and "kvm_arm_get_one_reg".
In arm, the default value of CONFIG_KVM is no.
While the target is arm, the compilation fails because
the function "kvm_arm_cpu_feature_supporte" is declared
or the function "kvm_arm_get_one_reg" is not defined.
Signed-off-by: zhanghao1 <zhanghao1@kylinos.cn>
