kconfig: move prompt handling to menu_add_prompt() from menu_add_prop()

menu_add_prompt() is the only function that calls menu_add_prop() with
non-NULL prompt.

So, the code inside the if-conditional block of menu_add_prop() can be
moved to menu_add_prompt().
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/menu.c

@@ -132,7 +132,14 @@ static struct property *menu_add_prop(enum prop_type type, char *prompt, struct
 	prop->expr = expr;
 	prop->visible.expr = dep;
 
-	if (prompt) {
+	return prop;
+}
+
+struct property *menu_add_prompt(enum prop_type type, char *prompt,
+				 struct expr *dep)
+{
+	struct property *prop = menu_add_prop(type, prompt, NULL, dep);
+
 	if (isspace(*prompt)) {
 		prop_warn(prop, "leading whitespace ignored");
 		while (isspace(*prompt))
@@ -142,7 +149,7 @@ static struct property *menu_add_prop(enum prop_type type, char *prompt, struct
 		prop_warn(prop, "prompt redefined");
 
 	/* Apply all upper menus' visibilities to actual prompts. */
-		if(type == P_PROMPT) {
+	if (type == P_PROMPT) {
 		struct menu *menu = current_entry;
 
 		while ((menu = menu->parent) != NULL) {
@@ -151,34 +158,25 @@ static struct property *menu_add_prop(enum prop_type type, char *prompt, struct
 			if (!menu->visibility)
 				continue;
 			/*
-				 * Do not add a reference to the
-				 * menu's visibility expression but
-				 * use a copy of it.  Otherwise the
-				 * expression reduction functions
-				 * will modify expressions that have
-				 * multiple references which can
-				 * cause unwanted side effects.
+			 * Do not add a reference to the menu's visibility
+			 * expression but use a copy of it. Otherwise the
+			 * expression reduction functions will modify
+			 * expressions that have multiple references which
+			 * can cause unwanted side effects.
 			 */
 			dup_expr = expr_copy(menu->visibility);
 
-				prop->visible.expr
-					= expr_alloc_and(prop->visible.expr,
+			prop->visible.expr = expr_alloc_and(prop->visible.expr,
 							    dup_expr);
 		}
 	}
 
 	current_entry->prompt = prop;
-	}
 	prop->text = prompt;
 
 	return prop;
 }
 
-struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
-{
-	return menu_add_prop(type, prompt, NULL, dep);
-}
-
 void menu_add_visibility(struct expr *expr)
 {
 	current_entry->visibility = expr_alloc_and(current_entry->visibility,