10087 atge_attach() doesn't need to check for kmem_zalloc() success

*** 21,30 ****
--- 21,32 ----
  
  /*
   * Copyright (c) 2012 Gary Mills
   *
   * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+  *
+  * Copyright (c) 2018, Joyent, Inc.
   */
  /*
   * Copyright (c) 2009, Pyun YongHyeon <yongari@FreeBSD.org>
   * All rights reserved.
   *
*** 1350,1362 ****
  fail3:
          ddi_regs_map_free(&atgep->atge_io_handle);
  fail2:
          pci_config_teardown(&atgep->atge_conf_handle);
  fail1:
-         if (atgep)
                  kmem_free(atgep, sizeof (atge_t));
- 
          return (DDI_FAILURE);
  }
  
  static int
  atge_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
--- 1352,1362 ----