Move WRITE_FAN

Marlin/src/inc/Conditionals_post.h

 
 #if FAN_COUNT > 0
   #define HAS_FAN 1
-  #define WRITE_FAN(n, v) WRITE(FAN##n##_PIN, (v) ^ FAN_INVERTING)
 #endif
 
 /**

Marlin/src/module/temperature.cpp

     static SoftPWM soft_pwm_chamber;
   #endif
 
+  #define WRITE_FAN(n, v) WRITE(FAN##n##_PIN, (v) ^ FAN_INVERTING)
+
   #if DISABLED(SLOW_PWM_HEATERS)
 
     #if ANY(HAS_HOTEND, HAS_HEATED_BED, HAS_HEATED_CHAMBER, FAN_SOFT_PWM)