sfc: Remove kernel-doc for efx_ptp_data fields not present in this version

 * @nic_ts_enabled: Flag indicating if NIC generated TS events are handled

 * @txbuf: Buffer for use when transmitting (PTP) packets to MC (avoids

 *         allocations in main data path).

 * @debug_ptp_dir: PTP debugfs directory

 * @missed_rx_sync: Number of packets received without syncrhonisation.

 * @good_syncs: Number of successful synchronisations.

 * @no_time_syncs: Number of synchronisations with no good times.

 * @bad_sync_durations: Number of synchronisations with bad durations.

 * @bad_syncs: Number of failed synchronisations.

 * @last_sync_time: Number of nanoseconds for last synchronisation.

 * @sync_timeouts: Number of synchronisation timeouts

 * @fast_syncs: Number of synchronisations requiring short delay

 * @min_sync_delta: Minimum time between event and synchronisation

 * @max_sync_delta: Maximum time between event and synchronisation

 * @average_sync_delta: Average time between event and synchronisation.

 *                      Modified moving average.

 * @last_sync_delta: Last time between event and synchronisation

 * @mc_stats: Context value for MC statistics

 * @timeset: Last set of synchronisation statistics.

 */

struct efx_ptp_data {