ASoC: wsa883x: Add support for wsa883x speaker amplifer

WSA883x is a speaker amplifier with soundwire interface and
enumerates as soundwire slave. WSA883x supports audio playback
on speakers and has temperature sensors for better speaker
protection and enhanced boost control support. Add software
driver support to enable WSA883x speaker amplifier.

Change-Id: Ib9cf2eebdda5ce331154bc786f059c5757f34fa2
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>