ARM: dts: Set max17047 over heat and voltage thresholds for exynos4412-trats2

Add some safe values for over heat and over voltage. The Trats2 uses
3.8 V battery and during testing it operated properly under 4.48 V.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>