Add snapshot of device-tree bindings for AON event bridge and respective rpmsg drivers from msm-5.15.c2 in YAML format. Snapshot is taken from msm-5.15.c2 kernel commit 95ffcf910eee ("ARM: dts: msm: add aon-rma glink node"). Change-Id: I695cab16e872800d558ccf269c1cb32bbe9bb2f0 Signed-off-by: Koushik Immadisetty <quic_kimmadis@quicinc.com>