trace: trace monitor qmp dispatch/completion

Add trace events for handle_qmp_command(), which dispatches qmp
commands, and monitor_protocol_emitter(), which produces the reply to a
qmp command.

Also remove duplicate #include "trace/control.h".

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/trace-events b/trace-events
index f408564..c9fd8e5 100644
--- a/trace-events
+++ b/trace-events
@@ -534,3 +534,7 @@
 esp_mem_writeb_cmd_selatn(uint32_t val) "Select with ATN (%2.2x)"
 esp_mem_writeb_cmd_selatns(uint32_t val) "Select with ATN & stop (%2.2x)"
 esp_mem_writeb_cmd_ensel(uint32_t val) "Enable selection (%2.2x)"
+
+# monitor.c
+handle_qmp_command(void *mon, const char *cmd_name) "mon %p cmd_name \"%s\""
+monitor_protocol_emitter(void *mon) "mon %p"