ARM: S5PV310: Add Interrupt of MCT

This patch adds IRQ_MCT0, IRQ_MCT1, IRQ_MCT_L0, and IRQ_MCT_L1.
(MCT: Multi-Core Timer). And updated MAX_COMBINER_NR.

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>