rmt_receive() function

- ESP_OK: Initiate receive job successfully - ESP_ERR_INVALID_ARG: Initiate receive job failed because of invalid argument - ESP_ERR_INVALID_STATE: Initiate receive job failed because channel is not enabled - ESP_FAIL: Initiate receive job failed because of other error

This function is non-blocking, it initiates a new receive job and then returns. User should check the received data from the `on_recv_done` callback that registered by `rmt_rx_register_event_callbacks()`. This function can also be called in ISR context. If you want this function to work even when the flash cache is disabled, please enable the `CONFIG_RMT_RECV_FUNC_IN_IRAM` option.