msm: clock-krait: Read CONFIG_CTL value and the vco mask from DT

The config control register may have different reset
values on different MSMs. Also, not all HFPLLS may need
to switch between VCO modes. Read both the config control
register initialization value and the VCO user control
mask from device tree.

Change-Id: I832ee3acaa7f4b7b0637d0732ddf275d9475e8bc
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>