odroid: clock: set aclk_cores to 200MHz

This change fixes suspend/resume issue in the kernel caused
by the wrong 'aclk_cores' clock value expected by the kernel.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>