ARM: dts: msm: Add vdd restriction support for msm8916

Enable the vdd restriction feature for VDD_DIG and VDD_APPS when low
temperature condition happens on msm8916. Specify the low temperature
thresholds, add the voltage rail and cpu frequency information.
Voltage floor will be set when threshold is crossed, and voltage floor
will be cleared when threshold hysteresis is crossed.

Change-Id: I0bd0c1d9c6328ccc887451049700c33dfca29310
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>