PTR_RET is now PTR_ERR_OR_ZERO(): Replace most.

Sweep of the simple cases.

Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

drivers/net/appletalk/ltpc.c

@@ -1243,7 +1243,7 @@ static int __init ltpc_module_init(void)
 		       "ltpc: Autoprobing is not recommended for modules\n");
 
 	dev_ltpc = ltpc_probe();
-	return PTR_RET(dev_ltpc);
+	return PTR_ERR_OR_ZERO(dev_ltpc);
 }
 module_init(ltpc_module_init);
 #endif