ASoC: msm8996: Add CPE ECPP DAI instance for ECPP path

Add support for CPE(Codec Processing Engine) second voice
wakeup session using ECPP(Echo cancellation Ping-Pong) hardware
path. This allows to enable two concurrent CPE sessions, one
on MAD(Mic Always-on Detection) and the other on ECPP.

CRs-fixed: 1022917
Change-Id: I7a14a2d0b5455d427f90e02506b996fc615c848a
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>