asoc: codecs: wcd934x: add stub functions for codec APIs

If wcd934x config is removed, need to stub out the
APIs to load any dependent audio modules and enumerate
sound card.

Change-Id: If885d4d1f0ee83448ac41ed66b51f078978cb7d1
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>

asoc/codecs/wcd934x/wcd934x.c

@@ -9885,7 +9885,7 @@ static void tavil_cdc_vote_svs(struct snd_soc_codec *codec, bool vote)
 	return tavil_vote_svs(tavil, vote);
 }
 
-struct wcd_dsp_cdc_cb cdc_cb = {
+static struct wcd_dsp_cdc_cb cdc_cb = {
 	.cdc_clk_en = tavil_codec_internal_rco_ctrl,
 	.cdc_vote_svs = tavil_cdc_vote_svs,
 };