Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>
create a new general api to make rpmsgfs work with virtio/spi/uart transport. Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>
nuttx/driver/rpmsg: new folder, extract common rpmsg api in rptun.c to rpmsg.c. rpmsg provide rpmsg_ops to each backend for specific implementation. Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>