cfg80211: add helper for kfree'ing last_request
cfg80211: add helper for kfree'ing last_request

This is common code, this reduces the chance of making
a mistake of how we free it.

Signed-off-by: Luis R. Rodriguez <d4fa18192c5a479e564d29c2300c2e15afd1d8d7@do-not-panic.com>
Signed-off-by: Johannes Berg <bff32994ff0f8d048f262a8388145a71b6071bfe@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs