hikey960: Add debug-hifi to print the DSP logs

Bug: 64395692
Test: Manual

Change-Id: I6572cd36ff600848ff7c8a1111c27255e918485f
Signed-off-by: Niranjan Yadla <nyadla@cadence.com>
diff --git a/device-common.mk b/device-common.mk
index ffba33c..03e0500 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -17,6 +17,9 @@
 # Adjust the dalvik heap to be appropriate for a tablet.
 $(call inherit-product-if-exists, frameworks/native/build/tablet-10in-xhdpi-2048-dalvik-heap.mk)
 
+# Set vendor kernel path
+PRODUCT_VENDOR_KERNEL_HEADERS := device/linaro/hikey/kernel-headers
+
 # Set custom settings
 DEVICE_PACKAGE_OVERLAYS := device/linaro/hikey/overlay