wifi: cfg80211: stop exporting wext symbols
CFG80211_WEXT_EXPORT is no longer needed, if we only make
ipw2200 return the static name for SIOCGIWNAME itself.
Link: https://patch.msgid.link/20241007211431.8d4a7242ce92.I66ceb885ddfa52c368feeea1ea884bf988c525f2@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>