Pass pointer to data. This necessitates to move delay from NR_gNB_ULSCH_t (ULSCH data, including transport channels etc) to NR_gNB_PUSCH (lower-PHY PUSCH data): 1. This allows to pass a single pointer to nr_pusch_channel_estimation() 2. To me, delay estimation seems to be a lower-PHY calculation, so it fits better anyway. Signed-off-by: Robert Schmidt <robert.schmidt@openairinterface.org>