ASoC: msm8996: Runtime detection of auxiliary codec on 8996

wsa881x is defined as auxiliary codec on 8996 target and has
two variants. Add runtime detection support based on unique
device id of wsa881x codec variant.

Change-Id: Ic785a114fe8ab608662a4625d89d342147b4556e
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>