exynos4/4x12: cpu: add extra gpio base addresses

After remove the offsets in Exynos4/4x12 gpio enums,
an additional gpio base addresses are required.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>