Add ATmega328P Xplained Mini board. The board is an official
development kit from MCHP based on the Arduino UNO, reduced
hardware, with a xplainedmini debugger and CDC ACM serial
converter.
Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
Add atxmega-a1u-xpro board to BOARD_INSUFFICIENT_MEMORY list to
exclude test since boards don't have enough data memory.
Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>