clk: qcom: clk-pll: Add support for HF PLLs clock ops

The current PLL set rate does not support determining
the L val at runtime. Add the new HF pll clock ops to
calculate L val for the requested frequency and also
update the determine rate for this requirement.

Change-Id: I104754e6d6aa1d824863431a63ce1c0bbf3f9fe8
Signed-off-by: Shefali Jain <shefjain@codeaurora.org>