ARM: EXYNOS: Remove static io-remapping for gic and combiner

The physical base address of GIC and Interrupt Combiner is obtained from
device tree and then remapped during initialization. So remove the
static io-remapping for GIC and combiner.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>