arm64: dts: exynos: Swap clock order of sysmmu on Exynos5433

dt-schema supports only order of names "aclk", "pclk".  Swap some sysmmu
definitions to make them compatible with schema.

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