audio-driver: update Makefile.am for LV

update Makefile.am for automotive LV audio driver build.

Change-Id: I1ad1a3de85fdb09818b8c1774919872b619dd0fd
Signed-off-by: Cong Tang <congt@codeaurora.org>
diff --git a/Makefile.am b/Makefile.am
index 7ee55c0..b705366 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -37,6 +37,14 @@
 obj-m += asoc/codecs/wcd937x/
 endif
 
+ifeq ($(TARGET_SUPPORT), $(filter $(TARGET_SUPPORT), sa8155))
+obj-m := ipc/
+obj-m += dsp/
+obj-m += asoc/
+obj-m += asoc/codecs/
+KBUILD_OPTIONS += CONFIG_SND_SOC_SA8155=m
+endif
+
 all:
 	$(shell rm -fr $(shell pwd)/soc/core.h)
 	$(shell ln -s $(KERNEL_SRC)/drivers/pinctrl/core.h $(shell pwd)/soc/core.h)