cfg80211: avoid using default in interface type switch

Most code avoids having a default case in interface type switch
statements already, to make it easier to find places that need
to be extended. Change the code in the __cfg80211_leave() and
nl80211_key_allowed() functions to not have a default case.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --cc net/wireless/core.c
Simple merge

diff --cc net/wireless/nl80211.c
Simple merge