clk: qcom: gcc-ipq806x: use parent_data for the last remaining entry

Use parent_data for the last remaining entry (pll4). This clock is
provided by the lcc device.

Fixes: cb02866f ("clk: qcom: gcc-ipq806x: convert parent_names to parent_data")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220927113826.246241-3-dmitry.baryshkov@linaro.org