[PATCH] Ns558 gameport warning

Ns558 gameport: constness of ns558_pnp_driver depends on CONFIG_PNP, causing a
warning if CONFIG_PNP is not set, so make sure it is never const.

drivers/input/gameport/ns558.c

@@ -243,7 +243,7 @@ static struct pnp_driver ns558_pnp_driver = {
 
 #else
 
-static const struct pnp_driver ns558_pnp_driver;
+static struct pnp_driver ns558_pnp_driver;
 
 #endif