Use new pico_clone_default_boot2 for changing SPI clock divisor

software/apps/bad_apple/CMakeLists.txt

@@ -10,7 +10,7 @@ add_executable(bad_apple
 
 # Increase CLKDIV to 4, because we're going to run the system at 372 MHz, and
 # the flash gets rather unhappy if you try to clock it at 186 MHz
-pico_define_boot_stage2(bad_apple_boot2 ${PICO_SDK_PATH}/src/rp2_common/boot_stage2/boot2_w25q080.S)
+pico_clone_default_boot_stage2(bad_apple_boot2)
 target_compile_definitions(bad_apple_boot2 PRIVATE PICO_FLASH_SPI_CLKDIV=4)
 pico_set_boot_stage2(bad_apple bad_apple_boot2)