clk: qcom: dispcc-sm8250: Disable EDP_GTC for sm8350

SM8350 does not have the EDP_GTC clock, so let's disable it
for this SoC.

Signed-off-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221102090140.965450-2-robert.foss@linaro.org