clk: qcom: clk-alpha-pll: program PLL_TEST/PLL_TEST_U if required

Program PLL_TEST and PLL_TEST_U registers if required by the pll
configuration.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230113120544.59320-3-dmitry.baryshkov@linaro.org