ARM: EXYNOS4: Fix the IRQ definitions for MIPI CSIS device

This is a regression fix after migration to the external GIC.
The breakage has been introduced in commit 69644a8e
("ARM: EXYNOS4: modify interrupt mappings for external GIC")

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: added commit id]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>