ARM: S5PC100: Fix Audio, Keypad and ADC clock sources

Audio, Keypad and ADC inherit PCLKD1 clock source.

Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
[kgene.kim@samsung.com: minor title fix]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>