jsonrpc: cleanup Doxygen comments

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I4d25092c37044abd7aa157342fc44e02c4a65df6
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7128
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Michal Berger <michalx.berger@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot

include/spdk/jsonrpc.h

@@ -82,7 +82,7 @@ struct spdk_jsonrpc_client_response {
  *
  * \param request JSON-RPC request to handle.
  * \param method Function to handle the request.
- * \param param Parameters passed to the function 'method'.
+ * \param params Parameters passed to the function 'method'.
  */
 typedef void (*spdk_jsonrpc_handle_request_fn)(
 	struct spdk_jsonrpc_request *request,