The mck is decided by the board design, move it to mb related
dtsi file.
Signed-off-by: NBo Shen <voice.shen@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>