misc. cleanup

Marlin/src/HAL/STM32/tft/tft_spi.cpp

   while ((SPIx.Instance->SR & SPI_FLAG_BSY) == SPI_FLAG_BSY) {}
 
   if (TFT_MISO_PIN != TFT_MOSI_PIN)
-    __HAL_SPI_CLEAR_OVRFLAG(&SPIx);   /* Clear overrun flag in 2 Lines communication mode because received is not read */
+    __HAL_SPI_CLEAR_OVRFLAG(&SPIx);   // Clear overrun flag in 2 Lines communication mode because received is not read
 }
 
 void TFT_SPI::TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Count) {
   // Wait last dma finish, to start another
-  while(isBusy()) { }
+  while (isBusy()) { /* nada */ }
 
   DMAtx.Init.MemInc = MemoryIncrease;
   HAL_DMA_Init(&DMAtx);
   HAL_DMA_Start(&DMAtx, (uint32_t)Data, (uint32_t)&(SPIx.Instance->DR), Count);
   __HAL_SPI_ENABLE(&SPIx);
 
-  SET_BIT(SPIx.Instance->CR2, SPI_CR2_TXDMAEN);   /* Enable Tx DMA Request */
+  SET_BIT(SPIx.Instance->CR2, SPI_CR2_TXDMAEN);   // Enable Tx DMA Request
 
   HAL_DMA_PollForTransfer(&DMAtx, HAL_DMA_FULL_TRANSFER, HAL_MAX_DELAY);
   Abort();

Marlin/src/lcd/extui/lib/anycubic_chiron/chiron_tft.cpp

 
   bool ChironTFT::ReadTFTCommand() {
     bool command_ready = false;
-    while(TFTSer.available() > 0 && command_len < MAX_CMND_LEN) {
+    while (TFTSer.available() > 0 && command_len < MAX_CMND_LEN) {
       panel_command[command_len] = TFTSer.read();
       if (panel_command[command_len] == '\n') {
         command_ready = true;
 
   int8_t ChironTFT::Findcmndpos(const char * buff, char q) {
     int8_t pos = 0;
-    do { if (buff[pos] == q) return pos; } while(++pos < MAX_CMND_LEN);
+    do { if (buff[pos] == q) return pos; } while (++pos < MAX_CMND_LEN);
     return -1;
   }
 

Marlin/src/lcd/extui/lib/dgus/mks/DGUSScreenHandler.cpp

 
   void DGUSScreenHandler::SDPrintingFinished() {
     if (DGUSAutoTurnOff) {
-      while(!queue.ring_buffer.empty()) queue.advance();
+      while (!queue.ring_buffer.empty()) queue.advance();
       gcode.process_subcommands_now_P(PSTR("M81"));
     }
     GotoScreen(MKSLCD_SCREEN_PrintDone);

Marlin/src/lcd/extui/lib/mks_ui/draw_print_file.cpp

     //root2.rewind();
     //SERIAL_ECHOLN(list_file.curDirPath);
 
-    if (curDirLever != 0) card.cd(list_file.curDirPath);
-    else card.cdroot(); // while(card.cdup());
+    if (curDirLever != 0)
+      card.cd(list_file.curDirPath);
+    else
+      card.cdroot();
 
     const uint16_t fileCnt = card.get_num_Files();
 

Marlin/src/lcd/menu/menu_ubl.cpp

         if (position_is_reachable(xy)) break; // Found a valid point
         ui.encoderPosition += step_dir;       // Test the next point
       #endif
-    } while(ENABLED(IS_KINEMATIC));
+    } while (ENABLED(IS_KINEMATIC));
 
     // Determine number of points to edit
     #if IS_KINEMATIC