wayland: use eglGetPlatformDisplay()

See aacc194. The same logic all applies to Wayland. In fact, we already
require EGL 1.5 for wayland anyway, so it's better to do it right.

video/out/opengl/context_wayland.c

@@ -163,7 +163,8 @@ static bool egl_create_context(struct ra_ctx *ctx)
     struct priv *p = ctx->priv = talloc_zero(ctx, struct priv);
     struct vo_wayland_state *wl = ctx->vo->wl;
 
-    if (!(p->egl_display = eglGetDisplay(wl->display)))
+    if (!(p->egl_display = eglGetPlatformDisplay(EGL_PLATFORM_WAYLAND_KHR,
+                                                 wl->display, NULL)))
         return false;
 
     if (eglInitialize(p->egl_display, NULL, NULL) != EGL_TRUE)