ARM: dts: Define default thermal-zones for exynos5422

Trip points corresponding to the one defined in the exynos_tmu_data.c
for Exynos5422 have been included so define thermal-zones attribute.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Tested-by: Markus Reichl <m.reichl@fivetechno.de>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>