clk: qcom: apss-ipq-pll: constify clk_init_data structures

The clk_init_data structures are never modified, so add const
qualifier to the ones where it is missing.

No functional changes.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Link: https://lore.kernel.org/r/20240328-apss-ipq-pll-cleanup-v4-4-eddbf617f0c8@gmail.com


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