ASoC: wsa881x: Add support to expose wsa881x codec version

Create wsa881x module and version info entry to expose
the chipset ID and version information of wsa881x audio
codec. Clients can use this information to identify codec
and its version which in turn can be used to access its
registers.

Change-Id: If1931585f16dffad50179ebd608a9f9999c8fe74
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>