net: Kconfig: depend on DM_RNG for WGET_HTTPS

net/lwip/wget.c/mbedtls_hardware_poll() is calling dm_rng_read() but
dependency is not recorded anywhere that's why depend on DM_RNG
when WGET_HTTPS is used.

Suggested-by: Michal Simek <michal.simek@amd.com>
Co-developed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Tested-by: Michal Simek <michal.simek@amd.com>
2 files changed