uboot-imx

memmove_wd: copy chunk down from big address if parameter to is larger than from

When watchdog is enabled, memmove_wd() always copy chunk up from small address.
This damanges overlapped memory data if destination address is smaller than
source address.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Simon Glass <sjg@chromium.org>