In mlme_get_wep_key, the key_length is got from the caller is
hardcoded to value 13. This should be updated based on the
length of the key and passed to the caller. But it is not
updated and value 13 is used to copy the key, resulting in
decrypt failure.
Also add debug logs to print wep key id and length.
Pass the key length by call by reference to update the key
length
Change-Id: Ie1e56a80db27894bf9f0426728f9fb74a014679e
CRs-Fixed: 2351182
129d6979e8