10570 Need workaround to EFI boot on AMI BIOS

*** 22,31 ****
--- 22,32 ----
  /*
   * Copyright 2012 DEY Storage Systems, Inc.  All rights reserved.
   * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   * Copyright 2016 Toomas Soome <tsoome@me.com>
+  * Copyright (c) 2019, Joyent, Inc.
   */
  
  /*
   * This module provides support for labeling operations for target
   * drivers.
*** 2745,2755 ****
  static int
  cmlb_validate_efi(efi_gpt_t *labp)
  {
          if (labp->efi_gpt_Signature != EFI_SIGNATURE)
                  return (EINVAL);
!         /* at least 96 bytes in this version of the spec. */
          if (sizeof (efi_gpt_t) - sizeof (labp->efi_gpt_Reserved2) >
              labp->efi_gpt_HeaderSize)
                  return (EINVAL);
          /* this should be 128 bytes */
          if (labp->efi_gpt_SizeOfPartitionEntry != sizeof (efi_gpe_t))
--- 2746,2756 ----
  static int
  cmlb_validate_efi(efi_gpt_t *labp)
  {
          if (labp->efi_gpt_Signature != EFI_SIGNATURE)
                  return (EINVAL);
!         /* at least 92 bytes in this version of the spec. */
          if (sizeof (efi_gpt_t) - sizeof (labp->efi_gpt_Reserved2) >
              labp->efi_gpt_HeaderSize)
                  return (EINVAL);
          /* this should be 128 bytes */
          if (labp->efi_gpt_SizeOfPartitionEntry != sizeof (efi_gpe_t))