ARM: dts: qcom: add per SoC compatible for qcom,kpss-gcc nodes

Add per Soc compatible for qcom,kpss-gcc nodes. While currently not used
by the kpss driver they can serve further customization and they are
required to be defined per Documentation schema.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230116204751.23045-5-ansuelsmth@gmail.com