dsp: q6adm: Update the proper param_hdr for offset

For Source Tracking adm_get_param, param_hdr (struct param_hdr_v3) size
being sent was different as param_hdr(struct param_hdr_v1)size used for
offset of virtual memory to copy the param data in out-band case get_param.

Change-Id: I01dd4f704cc5b6994f1203a0e28199a6936cba7f
Signed-off-by: Avinash Chandra <avicha@codeaurora.org>