1. Moving HT,VHT and HE flags setting into
WIFIRX_PPDU_END_USER_STATS_E case.
As this TLV already have preamble type populated.
2. NSS value wrongly populated in WIFIRX_PPDU_END_USER_STATS_E
case. It has been removed now.
Change-Id: I1c530385c585c0ea0dd14a07a6759a85b80e6a10