qcacld-3.0: Remove lim_send_sme_disassoc_ntf() serdes logic

An ancestor of the current driver used mailboxes for communication
between SME and LIM, and serialization/deserialization routines were
used to encode and decode the mailbox messages. This mechanism is no
longer in use, but there are remnants still present.

Two such remnants are in lim_send_sme_disassoc_ntf(). The logic for
creating both the Disassoc Response and the Disassoc Indication use a
combination of direct structure writes and serialized buffer writes.
Bring this logic up to date by removing all serialized buffer writes
and exclusively use direct structure writes.

Change-Id: I73be566a1512fdc9b8dc28c9ddf818b7c4aa26ed
CRs-Fixed: 2402223
1 file changed