ARM: dts: msm: add TPS65132 regulator device node for msm8939 QRD SKUK

A TPS65132 chip outputs positive and negative supply voltages for the
LCD panel driver on MSM8939 QRD SKUK boards. Add a device node for this
chip.

Change-Id: Idb75ef82f95bfb8da955a4f13a03f34cdc72b06e
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>