qmp-commands: move 'system_wakeup' doc to schema

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

docs/qmp-commands.txt

@@ -113,18 +113,6 @@ Example:
 -> { "execute": "screendump", "arguments": { "filename": "/tmp/image" } }
 <- { "return": {} }
 
-system_wakeup
--------------
-
-Wakeup guest from suspend.
-
-Arguments: None.
-
-Example:
-
--> { "execute": "system_wakeup" }
-<- { "return": {} }
-
 device_add
 ----------
 

qapi-schema.json

@@ -2306,6 +2306,12 @@
 # Since:  1.1
 #
 # Returns:  nothing.
+#
+# Example:
+#
+# -> { "execute": "system_wakeup" }
+# <- { "return": {} }
+#
 ##
 { 'command': 'system_wakeup' }