power: supply: qpnp-smb5: specify different ICL for QC2 9V/12V level

There is an existing device-tree property "qcom,hvdcp2-max-icl-ua" to
specify the ICL when QC2 charger adapter working at high voltage to
avoid VBUS voltage collapse. Normally QC2 adapters have different
current rating at different voltage level, hence keep the existing
property to specify the ICL setting at 9V level and add a new
property "qcom,hvdcp2-12v-max-icl-ua" to specify the ICL setting at
12V level.

Change-Id: I0811932de997b56a1d8d95bd5cbf22a194ffe035
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>