ARM: S5PV310: Fix clkset_moutcore_list

This patch fixes source clocks of moutcore.
That should be clk_mout_apll instead of clk_sclk_apll.

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>