Add basic hardware mapping information for all supported boards.

LUFA/Drivers/Board/XMEGA/A3BU_XPLAINED/LEDs.h

@@ -42,6 +42,12 @@
  *
  *  Board specific LED driver header for the Atmel XMEGA A3BU Xplained.
  *
+ *  <table>
+ *    <tr><th>Name</th><th>Color</th><th>Info</th><th>Active Level</th><th>Port Pin</th></tr>
+ *    <tr><td>LEDS_LED1</td><td>Yellow</td><td>LED0 LED</td><td>Low</td><td>PORTR.0</td></tr>
+ *    <tr><td>LEDS_LED2</td><td>Yellow</td><td>LED1 LED</td><td>Low</td><td>PORTR.1</td></tr>
+ *  </table>
+ *
  *  @{
  */