ARM: dts: msm: Move the "qcom,flash-disable-soc" out of child node

Currently the "qcom,flash-disable-soc" property is placed under
the flash child node, which is in-correct. Move it to the charger
main node.

Change-Id: Iacbc6b650857080ef1888b3007ea81b62a130aa5
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>