ARM: dts: exynos: Remove duplicated inclusion of syscon restart nodes on Exynos5410

The exynos-syscon-restart.dtsi is already included by exynos5.dtsi
(through exynos54xx.dtsi).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>