asoc: codecs: wcd9360: add stub functions for codec APIs

If wcd9360 config is removed, need to stub out the
APIs to load any dependent audio modules and enumerate
sound card.

Change-Id: I821938c68849984ee04565167488abe5fe15af40
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>