KVM: selftests: Mark test_hv_cpuid_e2big() static in Hyper-V CPUID test

Make the Hyper-V CPUID test's local helper test_hv_cpuid_e2big() static,
it's not used outside of the test (and isn't intended to be).

Reviewed-by: Vitaly Kuznetsov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>

Author: sean-jc

tools/testing/selftests/kvm/x86/hyperv_cpuid.c

@@ -111,7 +111,7 @@ static void test_hv_cpuid(const struct kvm_cpuid2 *hv_cpuid_entries,
 	}
 }
 
-void test_hv_cpuid_e2big(struct kvm_vm *vm, struct kvm_vcpu *vcpu)
+static void test_hv_cpuid_e2big(struct kvm_vm *vm, struct kvm_vcpu *vcpu)
 {
 	static struct kvm_cpuid2 cpuid = {.nent = 0};
 	int ret;