e1000e: clean up the local variable

The local variable 'ret' doesn't serve much purpose so we might as well
clean it up.
Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 5a5e889c)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -7504,14 +7504,11 @@ static struct pci_driver e1000_driver = {
  **/
 static int __init e1000_init_module(void)
 {
-	int ret;
-
 	pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
 		e1000e_driver_version);
 	pr_info("Copyright(c) 1999 - 2015 Intel Corporation.\n");
-	ret = pci_register_driver(&e1000_driver);
 
-	return ret;
+	return pci_register_driver(&e1000_driver);
 }
 module_init(e1000_init_module);