ARM: dts: msm: Update CNSS S12B voltage level to 1.35v

Set CNSS DTSI node for S12B voltage regulator to 1.35V. It was
initially set to 1.256V since AOP voltage range settings doe this
regulator was not correct.

Change-Id: If012586794c2a4ee95b79f95962f593fbb73531f