mx5: Add clock config interface
Add clock config interface support, so that we
can configure CPU or DDR clock in the later init
Signed-off-by: Jason Liu <jason.hui@linaro.org>
Signed-off-by: Eric Miao <eric.miao@linaro.org>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>