qcacld-3.0: Rename struct hdd_tx_rx_stats_s
The Linux Coding Style eschews the encoding of type information into
names, so rename struct hdd_tx_rx_stats_s to align with that guidance.
Change-Id: Idb6f8a6a2aa7704dedefdb78689c966babab8c42
CRs-Fixed: 2092737