Use MAX (not max) in stepper.h

Marlin/src/module/stepper.h

 #define MIN_ISR_LOOP_CYCLES (ISR_X_STEPPER_CYCLES + ISR_Y_STEPPER_CYCLES + ISR_Z_STEPPER_CYCLES + ISR_E_STEPPER_CYCLES + ISR_MIXING_STEPPER_CYCLES)
 
 // Calculate the minimum MPU cycles needed per pulse to enforce, limited to the max stepper rate
-#define _MIN_STEPPER_PULSE_CYCLES(N) max((F_CPU) / (MAXIMUM_STEPPER_RATE), ((F_CPU) / 500000UL) * (N))
+#define _MIN_STEPPER_PULSE_CYCLES(N) MAX((F_CPU) / (MAXIMUM_STEPPER_RATE), ((F_CPU) / 500000UL) * (N))
 #if MINIMUM_STEPPER_PULSE
   #define MIN_STEPPER_PULSE_CYCLES _MIN_STEPPER_PULSE_CYCLES(MINIMUM_STEPPER_PULSE)
 #else
 #define ADDED_STEP_TICKS ((MIN_STEPPER_PULSE_CYCLES) / (PULSE_TIMER_PRESCALE) - MIN_PULSE_TICKS)
 
 // But the user could be enforcing a minimum time, so the loop time is
-#define ISR_LOOP_CYCLES (ISR_LOOP_BASE_CYCLES + max(MIN_STEPPER_PULSE_CYCLES, MIN_ISR_LOOP_CYCLES))
+#define ISR_LOOP_CYCLES (ISR_LOOP_BASE_CYCLES + MAX(MIN_STEPPER_PULSE_CYCLES, MIN_ISR_LOOP_CYCLES))
 
 // If linear advance is enabled, then it is handled separately
 #if ENABLED(LIN_ADVANCE)
   #endif
 
   // And the real loop time
-  #define ISR_LA_LOOP_CYCLES max(MIN_STEPPER_PULSE_CYCLES, MIN_ISR_LA_LOOP_CYCLES)
+  #define ISR_LA_LOOP_CYCLES MAX(MIN_STEPPER_PULSE_CYCLES, MIN_ISR_LA_LOOP_CYCLES)
 
 #else
   #define ISR_LA_LOOP_CYCLES 0UL