KVM: VMX: Use local pointer to vcpu_vmx in vmx_vcpu_after_set_cpuid()

There is a local that contains a pointer to vcpu_vmx already. Just use
that instead to get at the structure directly instead of doing pointer
arithmetic.

No functional change intended.
Signed-off-by: Oliver Upton <oupton@google.com>
Message-Id: <20220204204705.3538240-8-oupton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/vmx.c

@@ -7344,11 +7344,11 @@ static void vmx_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
 						vmx_secondary_exec_control(vmx));
 
 	if (nested_vmx_allowed(vcpu))
-		to_vmx(vcpu)->msr_ia32_feature_control_valid_bits |=
+		vmx->msr_ia32_feature_control_valid_bits |=
 			FEAT_CTL_VMX_ENABLED_INSIDE_SMX |
 			FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
 	else
-		to_vmx(vcpu)->msr_ia32_feature_control_valid_bits &=
+		vmx->msr_ia32_feature_control_valid_bits &=
 			~(FEAT_CTL_VMX_ENABLED_INSIDE_SMX |
 			  FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX);