arm64: dts: qcom: ipq6018: fix GCC node name

Device nodes should have generic names. Use 'clock-controller@' as a GCC
node name instead of a non-generic 'gcc@'.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240529-qcom-gdscs-v2-13-69c63d0ae1e7@linaro.org


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