dt-bindings: interconnect: qcom: rpm: Clean up the example

One example is enough, remove the others and fix up the indentation
while at it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230721-topic-icc_bindings-v2-7-e33d5acbf3bd@linaro.org


Signed-off-by: Georgi Djakov <djakov@kernel.org>