arm: dts: exynos4: fix the device-tree compile warning

After updating dtc-1.4.5 version, there are too many warning.
This patch is to fix about exynos4 series.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
6 files changed