The members of the esp_decrypt_cfg_t configuration structure have been updated to correctly
reflect that we are using RSA private key member for the decryption purpose. Earlier their names were
incorrect. This old names have been marked as deprecated for IDF 5.2 release. This change can be viewed
at https://github.com/espressif/idf-extra-components/pull/187 and its part of esp_encrypted_img
component version 2.0.4
This commit updated to newer API usage from esp_encrypted_img component v2.0.4 for
pre_encrypted_ota example.