Snapshot the gic interrupt router documentation from qcom-6.1 commit e3266c8e04f8 ("dt-bindings: Add device-tree bindings for gic-interrupt-router"). Change-Id: I5ad2acfe88680f77d85131bd52383674d118bcd3 Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>