Disable DTLN test on hifimini & VP6 (#2391)

The new DTLN test is failing on HiFi Mini & VP6. This PR disables the test on those targets while being investigated.

BUG=b/319712246

tensorflow/lite/micro/examples/dtln/Makefile.inc

diff --git a/tensorflow/lite/micro/examples/dtln/Makefile.inc b/tensorflow/lite/micro/examples/dtln/Makefile.inc
index a64686e..e88cf09 100644
--- a/tensorflow/lite/micro/examples/dtln/Makefile.inc
+++ b/tensorflow/lite/micro/examples/dtln/Makefile.inc
@@ -23,5 +23,8 @@
 CCFLAGS := $(filter-out $(CC_WARNINGS),$(CCFLAGS))
 
 # Tests loading and running a dtln model.
-$(eval $(call microlite_test,dtln_test,\
-$(DTLN_TEST_SRCS),$(DTLN_TEST_HDRS),$(DTLN_GENERATOR_INPUTS)))
+# TODO(b/319712246): Re-enable tests once the dtln_test works on HiFi Mini & VP6
+ifneq ($(TARGET_ARCH), $(filter $(TARGET_ARCH), hifimini vision_p6))
+  $(eval $(call microlite_test,dtln_test,\
+  $(DTLN_TEST_SRCS),$(DTLN_TEST_HDRS),$(DTLN_GENERATOR_INPUTS)))
+endif