Add #cooling-cells for i.MX6/7 SoCs for cpufreq cooling device usage.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Bastian Stender <bst@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>