interconnect: qcom: icc-rpmh: Retire DEFINE_QNODE

This helper has no users anymore. Kill it with heavy fire.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Link: https://lore.kernel.org/r/20230811-topic-icc_retire_macrosd-v1-10-c03aaeffc769@linaro.org


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