staging: r8188eu: change rtw_ieee80211_ht_cap type of structures members to ieee80211_ht_cap

Also cap_info member of ieee80211_ht_cap wrapped by le16_to_cpu function.

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