configs: holi: Add initial mixer paths for holi

Add initial mixer paths for holi mtp variant, remove cdp files
as we have no separate sound card for that.

Change-Id: Iabed522633aa5e0c25c36d3072e9b4cb0daf342f
Signed-off-by: Faiz Nabi Kuchay <fkuchay@codeaurora.org>