zenfone9: Switch to device_kernel_headers

Change-Id: I1326ab652e159e56e52a307212480001fd507a32
diff --git a/BoardConfig.mk b/BoardConfig.mk
index dd21ec0..bd08f2e 100755
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -207,6 +207,7 @@
 
 # Platform
 TARGET_BOARD_PLATFORM_GPU := qcom-adreno660
+TARGET_USES_KERNEL_PLATFORM := true
 
 # Properties
 TARGET_PRODUCT_PROP += $(DEVICE_PATH)/product.prop