Upgrade an ifdef

Marlin/Configuration_adv.h

 
   // Add additional compensation depending on hotend temperature
   // Note: this values cannot be calibrated and have to be set manually
-  #ifdef PROBE_TEMP_COMPENSATION
+  #if ENABLED(PROBE_TEMP_COMPENSATION)
     // Max temperature that can be reached by heated bed.
     // This is required only for the calibration process.
     #define PTC_MAX_BED_TEMP 110