ARM: dts: ux500: Disable charging on HREF boards

The HREF boards are usually used without battery and not
using active charging. Disable it.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230417075659.3162603-1-linus.walleij@linaro.org