arm/dts/ls2085a: Bring in ls2085a dts files from linux kernel

Bring in required device tree files for ls2085a 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>
Reviewed-by: York Sun <yorksun@freescale.com>