refactor: SD card SPI HAL (#3957)

* refactor: SD card SPI driver

* Removed SPI and DMA StdPeriph drivers

* Allow for disabling SPI DMA support

* Disable SPI sdcard CRC support

* Fix 2MHz timer on NV14

* Shared VS1053b driver

* Fix: SPI2 uses PCLK1

* feat: new generic diskio API

* More generic SD_CARD_PRESENT()

* Fixes

* Flush incoming block on token mismatch

* Scratch buffer test

* Incredible hack to re-sync sd card

* fix: SDIO driver

radio/src/serial.cpp

@@ -83,16 +83,13 @@ extern "C" void dbgSerialPrintf(const char * format, ...)
   va_list arglist;
   char tmp[PRINTF_BUFFER_SIZE+1];
 
-  // no need to do anything if we don't have an output
-  if (!dbg_serial_putc) return;
-
   va_start(arglist, format);
   vsnprintf(tmp, PRINTF_BUFFER_SIZE, format, arglist);
   tmp[PRINTF_BUFFER_SIZE] = '\0';
   va_end(arglist);
 
   const char *t = tmp;
-  while (*t && dbg_serial_putc) {
+  while (*t) {
     SEGGER_RTT_Write(0, (const void *)t++, 1);
   }
 }