This adds the DDR3-1333 timing via its own DTS and wires it up. This
is not the default timing for the RK3399-Q7 and should be selected
explicitly via the config (CONFIG_DEFAULT_DEVICE_TREE).
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Simon Glass <sjg@chromium.org>
