Add snapshot of device-tree bindings for AON spi, interface and it's corresponding 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: I5c66e660b674fee78f541b267027a34f92717e0c Signed-off-by: Koushik Immadisetty <quic_kimmadis@quicinc.com>