tests/pkg_semtech-loramac: use semtech_loramac_rx with supported boards

tests/pkg_semtech-loramac/Makefile

@@ -4,17 +4,26 @@ include ../Makefile.tests_common
 
 BOARD_INSUFFICIENT_MEMORY := arduino-duemilanove arduino-leonardo arduino-nano \
                              arduino-uno nucleo-f031k6 nucleo-f042k6 \
-                             nucleo-l031k6 waspmote-pro
+                             nucleo-l031k6
 
 BOARD_BLACKLIST := msb-430 msb-430h pic32-clicker pic32-wifire \
                    telosb wsn430-v1_3b wsn430-v1_4 z1
 
+# waspmote-pro doesn't have enough RAM to support another thread dedicated to
+# RX messages
+BOARD_WITHOUT_LORAMAC_RX := waspmote-pro
+
 LORA_DRIVER ?= sx1276
 LORA_REGION ?= EU868
 
 USEPKG += semtech-loramac
 USEMODULE += $(LORA_DRIVER)
 
+# load loramac RX if board supports it
+ifeq (,$(filter $(BOARD),$(BOARD_WITHOUT_LORAMAC_RX)))
+  USEMODULE += semtech_loramac_rx
+endif
+
 USEMODULE += shell
 USEMODULE += shell_commands
 USEMODULE += fmt