pack_scmi_header
pack_scmi_header(&xfer->hdr));
msg->msg_header = cpu_to_le32(pack_scmi_header(&xfer->hdr));
*m = cpu_to_le32(pack_scmi_header(&xfer->hdr));
pack_scmi_header(&xfer->hdr));
iowrite32(pack_scmi_header(&xfer->hdr), &shmem->msg_header);