clk: qcom: hfpll: use clk_parent_data to specify the parent

This permits extending the driver to other platforms without having to
modify its source code.

Co-developed-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Link: https://lkml.kernel.org/r/20191125135910.679310-6-niklas.cassel@linaro.org


Signed-off-by: Stephen Boyd <sboyd@kernel.org>