configs: lito: Add mixer paths xml files for lito

Add mixer paths xml files for lito. Also rename
mixer paths mtp to mixer paths as a part of pixel
and non pixel convergence. Also update PCM IDs
for spkr calib usecase.

Change-Id: I7d5b608b94d47e8c77d711856fd69900d85c6ff2
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>