qapi script: code move for generate_enum_name()

Later both qapi-types.py and qapi-visit.py need a common function
for enum name generation.

Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

scripts/qapi-types.py

@@ -127,16 +127,6 @@ const char *%(name)s_lookup[] = {
 ''')
     return ret
 
-def generate_enum_name(name):
-    if name.isupper():
-        return c_fun(name, False)
-    new_name = ''
-    for c in c_fun(name, False):
-        if c.isupper():
-            new_name += '_'
-        new_name += c
-    return new_name.lstrip('_').upper()
-
 def generate_enum(name, values):
     lookup_decl = mcgen('''
 extern const char *%(name)s_lookup[];

scripts/qapi.py

@@ -467,3 +467,13 @@ def guardend(name):
 
 ''',
                  name=guardname(name))
+
+def generate_enum_name(name):
+    if name.isupper():
+        return c_fun(name, False)
+    new_name = ''
+    for c in c_fun(name, False):
+        if c.isupper():
+            new_name += '_'
+        new_name += c
+    return new_name.lstrip('_').upper()