ARM: dts: Drop interrupt controller properties from MCT nodes for exynos4 SoCs

MCT is not an interrupt controller and so there is no point for device
tree nodes representing it to contain interrupt-controller
and #interrupt-cells properties.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>