arm64: dts: qcom: sdm636-sony-xperia-ganges-mermaid: correct sdc2 pinconf

Fix the device tree node in the &sdc2_state_on override. The sdm630 uses
'clk' rather than 'pinconf-clk'.

Fixes: 4c1d849e ("arm64: dts: qcom: sdm630-xperia: Retire sdm630-sony-xperia-ganges.dtsi")
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220521202708.1509308-9-dmitry.baryshkov@linaro.org