uboot-imx

dm: ls1021a: Bring in ls1021a dts files from linux kernel

Bring in required device tree files for ls1021a from Linux.
These are initially unchanged and have a number of pieces not needed by U-Boot.

Signed-off-by: Haikun Wang <Haikun.Wang@freescale.com>
Acked-by: Simon Glass <sjg@chromium.org>