kconfig: rename depends_list to comment_option_list

Now the comment_stmt is the only user of depends_list. Rename it to
comment_option_list
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

scripts/kconfig/zconf.y

@@ -379,7 +379,12 @@ comment: T_COMMENT prompt T_EOL
 	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 };
 
-comment_stmt: comment depends_list
+comment_stmt: comment comment_option_list
+;
+
+comment_option_list:
+	  /* empty */
+	| comment_option_list depends
 ;
 
 /* help option */
@@ -408,11 +413,6 @@ help: help_start T_HELPTEXT
 
 /* depends option */
 
-depends_list:
-	  /* empty */
-	| depends_list depends
-;
-
 depends: T_DEPENDS T_ON expr T_EOL
 {
 	menu_add_dep($3);