Add priority field to rpmsg_endpoint structure to support
message prioritization. This allows different endpoints to
have different priority levels for scheduling purposes.
Changes:
- Define priority constants (MIN=0, DEFAULT=127, MAX=255)
- Add RPMSG_PRIO_RT alias for real-time priority
- Add priority field to struct rpmsg_endpoint
- Initialize priority to default value in rpmsg_register_endpoint()
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
5e2b3a114f