- Rename WRITE_E_STEP for consistency

- Add BIT and TEST macros
- Add _APPLY_ macros to stepper.cpp to help with consolidation
- Consolidate code in stepper.cpp using macros
- Apply standards in stepper.cpp
- Use >= 0 instead of > -1 as a better semantic
- Replace DUAL_Y_CARRIAGE with Y_DUAL_STEPPER_DRIVERS

Marlin/SdVolume.cpp

@@ -360,7 +360,7 @@ bool SdVolume::init(Sd2Card* dev, uint8_t part) {
   blocksPerCluster_ = fbs->sectorsPerCluster;
   // determine shift that is same as multiply by blocksPerCluster_
   clusterSizeShift_ = 0;
-  while (blocksPerCluster_ != (1 << clusterSizeShift_)) {
+  while (blocksPerCluster_ != BIT(clusterSizeShift_)) {
     // error if not power of 2
     if (clusterSizeShift_++ > 7) goto fail;
   }