Mbed TLS: Add support for generating the needed config header via Kconfig system

[gustavonihei]

Some features of Mbed TLS library may be configured via a mbedtls_config.h header. NuttX currently provides default configuration with a set of cryptographic algorithms.

A much welcome improvement is to make the selection of those features configurable (e.g. via menuconfig), similar to how LVGL's features are currently configured.

[xiaoxiang781216]

Good idea