audio-kernel: Add KERNEL_DLKM check flags

Add flags to only compile dlkms if system wide flags is true
or if the project specific flag is enabled.

Change-Id: I3a3bfcf4ceabef1c9d3a619de83a9a68caddf624

audio_kernel_vendor_board.mk

@@ -1,5 +1,16 @@
-include vendor/qcom/opensource/audio-kernel/audio_kernel_modules.mk
-ifeq ($(ENABLE_AUDIO_LEGACY_TECHPACK),true)
-include vendor/qcom/opensource/audio-kernel/legacy/audio_kernel_modules.mk
+AUDIO_DLKM_ENABLE := false
+ifeq ($(TARGET_KERNEL_DLKM_DISABLE), true)
+  ifeq ($(TARGET_KERNEL_DLKM_AUDIO_OVERRIDE),true)
+    AUDIO_DLKM_ENABLE := true
+  endif
+else
+  AUDIO_DLKM_ENABLE := true
+endif
+
+ifeq ($(AUDIO_DLKM_ENABLE), true)
+  include vendor/qcom/opensource/audio-kernel/audio_kernel_modules.mk
+  ifeq ($(ENABLE_AUDIO_LEGACY_TECHPACK),true)
+    include vendor/qcom/opensource/audio-kernel/legacy/audio_kernel_modules.mk
+  endif
+  BOARD_VENDOR_KERNEL_MODULES += $(AUDIO_KERNEL_MODULES)
 endif
-BOARD_VENDOR_KERNEL_MODULES += $(AUDIO_KERNEL_MODULES)