ASoC: wcd9330: Add CPE specific input widget for MAD

Currently both CPE (Codec Processing Engine) and non-CPE based MAD have
the same input and output widgets  which makes it difficult to achieve
different routings for each of the use case. Add CPE specific MAD input
widget so that routings can be different for CPE and non-CPE based MAD.

Change-Id: I68d6507be050e1e7b68baca6180cc38b00ba6f33
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>