mbx_common_query_fw_config
struct mbx_common_query_fw_config *fwcmd;
fwcmd = (struct mbx_common_query_fw_config *)&mbx.payload;
sizeof (struct mbx_common_query_fw_config));
mbx.payload_length = sizeof (struct mbx_common_query_fw_config);
DW_SWAP(u32ptr(fwcmd), sizeof (struct mbx_common_query_fw_config));