ARM: S5PV210: Add IRQ support

This patch adds IRQ support for S5PV210. This patch adds interrupt
register definitions, IRQ definitions for various interrupt sources
and new VIC base for VIC2 and VIC3 in plat-s5p common irq code.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>