potter: Abandon TARGET_UNIFIED_DEVICE flag

* Override the unified properties using vendor init

Change-Id: Ia9f780793e06ed37ac26d6de395c73ee6e37f6c1

BoardConfig.mk

@@ -1,6 +1,6 @@
 #
 # Copyright (C) 2016 The CyanogenMod Project
-# Copyright (C) 2017 The LineageOS Project
+#               2017 The LineageOS Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -168,3 +168,4 @@ BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_qcwcn
 WIFI_DRIVER_FW_PATH_AP           := "ap"
 WIFI_DRIVER_FW_PATH_STA          := "sta"
 WPA_SUPPLICANT_VERSION           := VER_0_8_X
+

init/init_potter.cpp

@@ -68,7 +68,7 @@ void vendor_load_properties()
         return;
 
     std::string sku = property_get("ro.boot.hardware.sku");
-    property_set("ro.product.model", sku.c_str());
+    property_override("ro.product.model", sku.c_str());
 
     // rmt_storage
     std::string device = property_get("ro.boot.device");