ARM: S3C24XX: remove XXX_setup_clocks method from S3C2443

s3c2443_common_setup_clocks is always called through
s3c2443_common_init_clocks, so there is no need to call it separately.
It was also called twice through this separate call.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>