This commit adds support in the sample to deal with the case when TLS
is offloaded and mbedtls is not necessary.
Signed-off-by: Vincent Wan <vincent.wan@linaro.org>
This commit adds the necessary changes to allow the mqtt_publisher
sample to run on cc3220sf_launchxl.
Signed-off-by: Vincent Wan <vincent.wan@linaro.org>