Add missing SLL DTLS protocol for mbedtls on esp32-c6 (#2977)

Author: AdrianSoundy

targets/ESP32/_IDF/sdkconfig.default.esp32c6

@@ -56,11 +56,11 @@ CONFIG_MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH=y
 CONFIG_MBEDTLS_SSL_KEEP_PEER_CERTIFICATE=n
 CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=n
 CONFIG_MBEDTLS_HAVE_TIME_DATE=y
+CONFIG_MBEDTLS_SSL_PROTO_DTLS=y
 CONFIG_MBEDTLS_CLIENT_SSL_SESSION_TICKETS=n
 CONFIG_MBEDTLS_DES_C=y
 CONFIG_MBEDTLS_XTEA_C=y
 CONFIG_MBEDTLS_PEM_WRITE_C=n
-CONFIG_MBEDTLS_LARGE_KEY_SOFTWARE_MPI=n
 
 CONFIG_SPI_FLASH_SUPPORT_ISSI_CHIP=y
 CONFIG_SPI_FLASH_SUPPORT_MXIC_CHIP=y