staging: r8188eu: replace rtw_ieee80211_ht_cap with ieee80211_ht_cap type in...

staging: r8188eu: replace rtw_ieee80211_ht_cap with ieee80211_ht_cap type in rtw_check_beacon_data function

rtw_ieee80211_ht_cap is reimplementation of the ieee80211_ht_cap.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>