ARM: dts: msm: Update QRD device specific dsi regulators

The regulator information format for dsi specific
regulators is changed. This change updates the
QRD specific dsi regulators to new format.

Change-Id: I8b3699ce5d2a096e2d3988f4432994c466af3cf5
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>