Merge pull request #3207 from jbrazio/bugfix/toshiba-sdhc-flashair

Toshiba Flash Air Wifi SD card support

Marlin/Sd2Card.cpp

   spiRec();
 #endif
   chipSelectHigh();
+  // Send an additional dummy byte, required by Toshiba Flash Air SD Card
+  spiSend(0XFF);
   return true;
 fail:
   chipSelectHigh();
+  // Send an additional dummy byte, required by Toshiba Flash Air SD Card
+  spiSend(0XFF);
   return false;
 }
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