asoc: clean up audio drivers and remove unused files

Clean up audio drivers and remove unused files.

Change-Id: I50559ac3c5f4a1f4336e4480cd3ff235d015441e
Signed-off-by: Meng Wang <mengw@codeaurora.org>

asoc/codecs/wcd937x/Android.mk

@@ -9,7 +9,7 @@ endif
 
 AUDIO_CHIPSET := audio
 # Build/Package only in case of supported target
-ifeq ($(call is-board-platform-in-list,msm8953 sdm845 sdm670 qcs605 msmnile $(MSMSTEPPE) $(TRINKET)),true)
+ifeq ($(call is-board-platform-in-list,$(MSMSTEPPE) $(TRINKET)),true)
 
 LOCAL_PATH := $(call my-dir)