ASoC: msm: populate the codec type in 8916 machine driver

8916 target has capability to support the internal and external
codec. Populate the device tree entry for the codec type and
based on codec type mux configuration is done.

Change-Id: Ibeafb63e017b464b06882fb1a6a897c5262920e4
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>