KVM: SVM: do not set MSR_TSC_AUX on 32-bit builds

This is unnecessary---and besides, __getcpu() is not even
available on 32-bit builds.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/svm.c

@@ -4550,9 +4550,9 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 #endif
 		);
 
+#ifdef CONFIG_X86_64
 	if (static_cpu_has(X86_FEATURE_RDTSCP))
 		wrmsrl(MSR_TSC_AUX, __getcpu());
-#ifdef CONFIG_X86_64
 	wrmsrl(MSR_GS_BASE, svm->host.gs_base);
 #else
 	loadsegment(fs, svm->host.fs);