ARM: dts: ux500: Add trips to battery thermal zones

Recent changes to the thermal framework has made the trip
points (trips) for thermal zones compulsory, which made
the Ux500 DTS files break validation and also stopped
probing because of similar changes to the code.

Fix this by adding an "outer bounding box": battery thermal
zones should not get warmer than 70 degress, then we will
shut down.

Fixes: 8c596324 ("dt-bindings: thermal: Fix missing required property")
Fixes: 3fd6d6e2 ("thermal/of: Rework the thermal device tree initialization")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-pm@vger.kernel.org
Link: https://lore.kernel.org/r/20221030210854.346662-1-linus.walleij@linaro.org

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>