ARM: dts: msm: Enable battery charging cooling device in pmi632

Add cooling-cells property and battery charge limit config to pmi632
charger. This enables the charger cooling device to be referenced
in a thermal zone definition.

Change-Id: I12c6922dc3ffa9f119c7705adf1345e251b8258b
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>