clk: qcom: gcc: remove unnecessary vco_table from SM8150

The fixed alpha pll ops only use it for clamping in round_rate, which is
unnecessary. This is consistent with SM8250 GCC not using vco_table.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20200709135251.643-6-jonathan@marek.ca


Signed-off-by: Stephen Boyd <sboyd@kernel.org>