ASoC: sdm660-cdc: Add 4-mic DMIC support

Add route map and mix controls to support 4 digital mics
in SDM660 internal codec.

Change-Id: Ida16a910961d01a57d7d03dd64b61ecd36bad37d
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>
2 files changed