wifi: cfg80211: fix link del callback to call correct handler

The wrapper function was incorrectly calling the add handler instead of
the del handler. This had no negative side effect as the default
handlers are essentially identical.

Fixes: f2a0290b

 ("wifi: cfg80211: add optional link add/remove callbacks")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230608163202.ebd00e000459.Iaff7dc8d1cdecf77f53ea47a0e5080caa36ea02a@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>