dsp-kernel: Handle UAF scenario in put_args

Currently, the DSP updates header buffers with unused DMA handle fds.
In the put_args section, if any DMA handle FDs are present in the
header buffer, the corresponding map is freed. However, since the
header buffer is exposed to users in unsigned PD, users can update
invalid FDs. If this invalid FD matches with any FD that is already
in use, it could lead to a use-after-free (UAF) vulnerability.
As a solution,add DMA handle references for DMA FDs, and the map for
the FD will be freed only when a reference is found.

Change-Id: Ie4d19dc0ef0ebdda5ed2fe6f7b64598ef661a63f
Signed-off-by: quic_anane <quic_anane@quicinc.com>