Revert Cortex delay for now

Marlin/src/HAL/HAL_STM32/HAL.cpp

 // ------------------------
 
 // Needed for DELAY_NS() / DELAY_US() on CORTEX-M7
-#if (defined(__arm__) || defined(__thumb__)) && WITHIN(__CORTEX_M, 3, 7)
+#if (defined(__arm__) || defined(__thumb__)) && __CORTEX_M == 7
   // HAL pre-initialization task
   // Force the preinit function to run between the premain() and main() function
   // of the STM32 arduino core

Marlin/src/HAL/shared/Delay.h

 
 #if defined(__arm__) || defined(__thumb__)
 
-  #if WITHIN(__CORTEX_M, 3, 7)
+  #if __CORTEX_M == 7
 
     // Cortex-M3 through M7 can use the cycle counter of the DWT unit
     // http://www.anthonyvh.com/2017/05/18/cortex_m-cycle_counter/