zenfone6: Start using vendor_overlay

* This lets us override files in /vendor without
  relying on bind mounts ^.^

* Remove too NEED_KERNEL_MODULE_SYSTEM

Change-Id: I94c244b0329d6f6cfe7efdc77e0a3ccc22ab8843
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 05d19a4..c7fe693 100755
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -88,6 +88,9 @@
 # DRM
 TARGET_ENABLE_MEDIADRM_64 := true
 
+# Filesystem
+TARGET_FS_CONFIG_GEN := $(DEVICE_PATH)/config.fs
+
 # FM
 BOARD_HAS_QCA_FM_SOC := "cherokee"
 BOARD_HAVE_QCOM_FM := true
@@ -117,9 +120,6 @@
 BOARD_KERNEL_SEPARATED_DTBO := true
 TARGET_KERNEL_CLANG_COMPILE := true
 
-# Modules
-NEED_KERNEL_MODULE_SYSTEM := true
-
 # NFC
 TARGET_USES_NQ_NFC := true