Cmakelists: Generalise overlay path

Author: DhruvaG2000

samples/hello_arduino/CMakeLists.txt

@@ -2,10 +2,10 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-set(DTC_OVERLAY_FILE $ENV{HOME}/zephyrproject/modules/lib/Arduino-Zephyr-API/variants/ARDUINO_NANO_33_BLE/arduino_nano_33_ble.overlay)
++set(DTC_OVERLAY_FILE $ENV{ZEPHYR_BASE}/../modules/lib/Arduino-Zephyr-API/variants/${BOARD}/${BOARD}.overlay)
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(hello_world)
 
 target_sources(app PRIVATE src/app.cpp)
 
-zephyr_compile_options(-Wno-unused-variable -Wno-comment)
+zephyr_compile_options(-Wno-unused-variable -Wno-comment)