EFR32 examples : build failed with show_qr_code=false

[alexandre-humbert]

Hi,
I tried to compile the lighting app for BRD4186 (MG24) with show_qr_code=false and the build failed. (undefined reference to "LCDWriteQRCode")

I can't compile the examples with show_qr_code=false because disable_lcd=false by default. It works if I add disable_lcd=true.

I think the reason why it fails is that lcd.h is included in AppTask.c and LCDWriteQRCode() is called because disable_lcd=false => DISPLAY_ENABLED but LCDWriteQRCode() is not defined in lcd.h because show_qr_code=false => QR_CODE_ENABLED not defined.

#18474