ARM: dts: msm: Add qcom,hold-soc-while-full property for DTP8996

Hold SoC(state of charge) at 100% after battery charged to full
to make sure the SoC dropping to recharge threshold is not
noticeable.

Change-Id: I509ae76b9e937cbef269a3c78358bfa0c4b1afb8
Signed-off-by: Chunmei Cai <ccai@codeaurora.org>