[PATCH] softmac: clean up event handling code

This patch cleans up the event handling code in ieee80211softmac_event.c and
makes the module slightly smaller by removing some strings that are not used
any more and consolidating some code.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>