ARM: dts: msm: move device frequency nodes under soc handle

By mistake dcvs nodes are populated under pm6150_vadc handle
at the time of merging, now move them under soc handle.

Change-Id: I3064e6f15c45bba2666f6cb07777ea5e2feb6afc
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>