Add a imx6ull compatible string to be able to manage erratum ERR010450 on
i.MX6ULL.
Signed-off-by: NHaibo Chen <haibo.chen@nxp.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>