ARM: S5P64X0: Set DMA clock disable as default

This patch modify to DMA operation clock into disable list for default
clock setting.

Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>