armv8: ls1043aqds: make sure fixed-link property is big endian

When setting fixed-link property to DTS, the values should be converted
with using cpu_to_fdt32 so that to have correct value on little endian
Soc.

Signed-off-by: Shaohui Xie <Shaohui.Xie@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>