ASOC: Disable Temperature sensor of WSA881x for bengal

-Temperature sensor of WSA881x is not used in bengal
Hence disable compilation.
-Initialize temp_val before use for wsa881x-analog.

Change-Id: Ibfb2fdfabdba7acfad3f65911b89d007a0711f08
Signed-off-by: Dechen Chai <quic_dchai@quicinc.com>