ARM: dts: msm: Enable PMIC phase scaling based on eFuse scaling factor

Add a property to enable the driver to read the eFuse phase scaling factor
and apply it in the phase calculations. This improves the efficiency of
the PMIC's ganged regulator.

Change-Id: I6a3d3e4de081679054bff81ddb49c61a14f31b31
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>