platform: rename create_egl_window to create_egl_surface

Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/clients/simple-egl.c b/clients/simple-egl.c
index 1a0724d..c6a95eb 100644
--- a/clients/simple-egl.c
+++ b/clients/simple-egl.c
@@ -386,9 +386,9 @@
 				     window->geometry.width,
 				     window->geometry.height);
 	window->egl_surface =
-		weston_platform_create_egl_window(display->egl.dpy,
-						  display->egl.conf,
-						  window->native, NULL);
+		weston_platform_create_egl_surface(display->egl.dpy,
+						   display->egl.conf,
+						   window->native, NULL);
 
 
 	if (display->shell) {