Staging: rtl8192u: Remove old WIRELESS_EXT support

Remove support for building against ancient WIRELESS_EXT versions,
only leaving support for the current version: 22

Signed-off-by: Joel Pelaez Jorge <joelpelaez@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8192u/ieee80211/ieee80211.h
Simple merge

diff --cc drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
Simple merge

diff --cc drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c
Simple merge

diff --cc drivers/staging/rtl8192u/r8192U_core.c
Simple merge

diff --cc drivers/staging/rtl8192u/r8192U_wx.c
Simple merge