A few boards set clock frequency of their I2C buses with
"clock_frequency" property. The right property is "clock-frequency".
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>