qcacmn: fix incorrect NSS value in host RX stats

Revert change "Limit maxinum nss number as 2 for MCL platform" and
align with WIN function: hal_rx_msdu_start_nss_get_8074v2().
besides, only increase rx.nss[NSS - 1] when NSS is > 0 and rx packet
type is 11N/AC/AX.

Change-Id: I0a64f00a3d252c806216cc3196e71290f111c88a
CRs-Fixed: 2429329
2 files changed