clk: qcom: clk-hfpll: Configure l_val in init when required

Add support for pre-configuring default frequency multiplier,
this appears to be required on some platforms like MSM8976.
Without configuring L_VAL device reboots when trying to bring PLL up.

Signed-off-by: Adam Skladowski <a39.skl@gmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230812112534.8610-3-a39.skl@gmail.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>