KVM: VMX: cleanup rmode_segment_valid()

Set segment fields explicitly instead of using  binary operations.

No behaviour changes.
Reviewed-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NGleb Natapov <gleb@redhat.com>

arch/x86/kvm/vmx.c

@@ -3380,13 +3380,16 @@ static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
 	u32 ar;
 
 	vmx_get_segment(vcpu, &var, seg);
+	var.dpl = 0x3;
+	var.g = 0;
+	var.db = 0;
 	ar = vmx_segment_access_rights(&var);
 
 	if (var.base != (var.selector << 4))
 		return false;
 	if (var.limit < 0xffff)
 		return false;
-	if (((ar | (3 << AR_DPL_SHIFT)) & ~(AR_G_MASK | AR_DB_MASK)) != 0xf3)
+	if (ar != 0xf3)
 		return false;
 
 	return true;