ASoC: Change PRODUCT_OUT to OUT in Kbuild

Update module symbol folder from PRODUCT_OUT to OUT.

Change-Id: I4542c3d2b5e9e39b69f15954ef425c1915a58456
Signed-off-by: Meng Wang <mwang@codeaurora.org>

ipc/Kbuild

@@ -112,7 +112,7 @@ CDEFINES +=	-DANI_LITTLE_BYTE_ENDIAN \
 KBUILD_CPPFLAGS += $(CDEFINES)
 
 ifeq ($(KERNEL_BUILD), 0)
-KBUILD_EXTRA_SYMBOLS +=$(PRODUCT_OUT)/obj/vendor/qcom/opensource/audio-kernel/dsp/Module.symvers
+KBUILD_EXTRA_SYMBOLS +=$(OUT)/obj/vendor/qcom/opensource/audio-kernel/dsp/Module.symvers
 endif
 
 # Currently, for versions of gcc which support it, the kernel Makefile