dt-bindings: clock: qcom,x1e80100-gpucc: Extend for X1P42100

dt-bindings: clock: qcom,x1e80100-gpucc: Extend for X1P42100

To make it easier for X1P4 and X1E to share a common device tree base,
extend the existing latter's GPUCC bindings and reuse them on the
former platform.

While not in the same file, it only makes sense to introduce the new
compatible in this commit as well.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20241221-topic-x1p4_clk-v1-2-dbaeccb74884@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>