zephyr: examples: Makefile: do not use custom mbedtls config

We now set the build options to zephyr, so we make use of the
internal mbedtl in zephyr, so we do not require a specific header
file anymore.

Author: casaroli

examples/zephyr/Makefile

@@ -26,13 +26,12 @@ coap-client: client-src/src/main.c client-src/* ../../src/*.c ../../include/*/*
 	(if [ -f $(ZEPHYR_PROJECT)/.venv/bin/activate ]; then \
 	  . $(ZEPHYR_PROJECT)/.venv/bin/activate ;\
 	fi ;\
-	cp $${LIBCOAP_DIR}/zephyr/config-mbedtls-libcoap.h $(ZEPHYR_PROJECT)/zephyr/include/ ;\
 	cd $(ZEPHYR_PROJECT)/zephyr ;\
 	west build -p always -b native_sim \
-		$${LIBCOAP_DIR}/examples/zephyr/client-src -- \
+		$${LIBCOAP_DIR}/examples/zephyr/client-src \
+		--extra-conf libcoap-mbedtls.conf -- \
 		-DCONF_FILE=prj.conf \
-		-DEXTRA_ZEPHYR_MODULES=$${LIBCOAP_DIR} \
-		-DEXTRA_CONF_FILE=$${LIBCOAP_DIR}/zephyr/libcoap-mbedtls.conf)
+		-DEXTRA_ZEPHYR_MODULES=$${LIBCOAP_DIR})
 	@cp -f $(ZEPHYR_PROJECT)/zephyr/build/zephyr/zephyr.exe coap-client
 	@rm -rf $(ZEPHYR_PROJECT)/zephyr/build