ARM: at91: dt: add dts file for sama5d3 Xplained

Add the device tree file for sama5d3 Xplained board.

The dts files are copied from the Linux-4.9, do changes as below.
 - add the "u-boot,dm-pre-reloc" property to determine which nodes
   which are needed by SPL and by the board_init_f stage.
 - fix the compile warning.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
2 files changed