Use BOARD_HAS_DTLS instead of BOARD_WITHOUT_DTLS

Bug: 201700692
Test: Verified ninja files are unchanged
Change-Id: Iee95550f4cec940e1d2535ba44f89126c3b04d68
diff --git a/device.mk b/device.mk
index a8487c9..6eef600 100644
--- a/device.mk
+++ b/device.mk
@@ -564,7 +564,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/generic_ramdisk.mk)
 
 # Titan-M
-ifeq (,$(filter true, $(BOARD_WITHOUT_DTLS)))
+ifneq (,$(BOARD_HAS_DTLS))
 include hardware/google/pixel/dauntless/dauntless.mk
 endif