KVM: MIPS: Move .vcpu_setup() call to 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().
Note, there is no unwind function associated with kvm_arch_vcpu_setup(),
i.e. no teardown path that also needs to be moved.

No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/mips/kvm/mips.c

@@ -386,8 +386,15 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 	vcpu->arch.last_sched_cpu = -1;
 	vcpu->arch.last_exec_cpu = -1;
 
+	/* Initial guest state */
+	err = kvm_mips_callbacks->vcpu_setup(vcpu);
+	if (err)
+		goto out_free_commpage;
+
 	return 0;
 
+out_free_commpage:
+	kfree(vcpu->arch.kseg0_commpage);
 out_free_gebase:
 	kfree(gebase);
 out:
@@ -1237,10 +1244,9 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 	return 0;
 }
 
-/* Initial guest state */
 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 {
-	return kvm_mips_callbacks->vcpu_setup(vcpu);
+	return 0;
 }
 
 static void kvm_mips_set_c0_status(void)