kconfig: fixup after Lindent

Readability are more important then the 80 coloumn limit, so fold
several lines to greatly improve readability.
Also keep return type on same line as function definition.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/lxdialog/yesno.c b/scripts/lxdialog/yesno.c
index dffd5af..84f3e8e 100644
--- a/scripts/lxdialog/yesno.c
+++ b/scripts/lxdialog/yesno.c
@@ -96,8 +96,7 @@
 		case TAB:
 		case KEY_LEFT:
 		case KEY_RIGHT:
-			button = ((key == KEY_LEFT ? --button : ++button) < 0)
-			    ? 1 : (button > 1 ? 0 : button);
+			button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);
 
 			print_buttons(dialog, height, width, button);
 			wrefresh(dialog);