clk: qcom: Make GCC_6125 depend on QCOM_GDSC

Like all other non-ancient Qualcomm clock drivers, QCOM_GDSC is
required, as the GCC driver defines and instantiates a bunch of GDSCs.

Add the missing dependency.

Reported-by: Kamil Gołda <kamil.golda@protonmail.com>
Signed-off-by: Konrad Dybcio <quic_kdybcio@quicinc.com>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Link: https://lore.kernel.org/r/20241003-topic-6125kconfig-v1-1-f5e1efbff07c@quicinc.com


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