KVM: x86: Move guts of kvm_arch_vcpu_setup() into kvm_arch_vcpu_create()

Fold setup() into create() now that the two are called back-to-back by
common KVM code.  This paves the way for removing kvm_arch_vcpu_setup().
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/x86.c

@@ -9181,11 +9181,12 @@ int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 
 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 {
-	return kvm_x86_ops->vcpu_create(vcpu);
-}
+	int ret;
+
+	ret = kvm_x86_ops->vcpu_create(vcpu);
+	if (ret)
+		return ret;
 
-int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
-{
 	vcpu->arch.arch_capabilities = kvm_get_arch_capabilities();
 	vcpu->arch.msr_platform_info = MSR_PLATFORM_INFO_CPUID_FAULT;
 	kvm_vcpu_mtrr_init(vcpu);
@@ -9196,6 +9197,11 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 	return 0;
 }
 
+int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
+{
+	return 0;
+}
+
 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 {
 	struct msr_data msr;