ASoC: msm: qdsp6v2: set token for stereo_to_custom_stereo command

Set token value with port index and copp id so that
correct wait queue handle can be deduced in the
callback of adm_set_stereo_to_custom_stereo command.

Change-Id: Ica4c1442c1143f46de2baa6eaf1890ad0cb4b742
Signed-off-by: Shiv Maliyappanahalli <smaliyap@codeaurora.org>