MBEDTLS_ENTROPY_HARDWARE_ALT macro

\def MBEDTLS_ENTROPY_HARDWARE_ALT Uncomment this macro to let mbed TLS use your own implementation of a hardware entropy collector. Your function must be called \c mbedtls_hardware_poll(), have the same prototype as declared in entropy_poll.h, and accept NULL as first argument. Uncomment to use your own hardware entropy collector.