arm64: dts: sprd: sc2731: move fuel-gauge monitored-battery to device DTS

arm64: dts: sprd: sc2731: move fuel-gauge monitored-battery to device DTS

The monitored-battery property is a property of the board, not the PMIC.
Move this property to the DTS of its only user, sp9860g-1h10.
While at it, disable the fuel-gauge node by default and enable it only
for its users, as it requires board-specific properties to work correctly.

Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/2959aa8567afbef17337829072adce01158f00bb.1730918663.git.stano.jakubek@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>