ARM: at91: add SAMA5D3 Xplained board

Add DT file and defconfig file for new SAMA5D3 Xpained board.
This board is based on Atmel's SAMA5D36 Cortex-A5 SoC.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
ARM: at91: add PDA 4.3 display module support for SAMA5D3 Xplained board

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
[jiangxd@embedinfo.com: back port to 3.6.9 from 3.10]
Signed-off-by: Jiang XD<jiangxd@embedinfo.com>
Input: atmel_mxt_tx: switch to debug message and add pinctrl

Make the warning message as debug message.
Configure the interrupt pin through pinctrl subsystem.

Signed-off-by: Royce Jiang <jiangxd@embedinfo.com>