8620 pcplusmp shouldn't support x2APIC mode
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

*** 18,29 ****
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 1993, 2010, Oracle and/or its affiliates. All rights reserved.
   */
- 
  /*
   * Copyright (c) 2010, Intel Corporation.
   * All rights reserved.
   */
  
--- 18,29 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 1993, 2010, Oracle and/or its affiliates. All rights reserved.
+  * Copyright 2017 Joyent, Inc.
   */
  /*
   * Copyright (c) 2010, Intel Corporation.
   * All rights reserved.
   */
  
*** 115,124 ****
--- 115,127 ----
  
  /* General x2APIC constants used at various places */
  #define APIC_SVR_SUPPRESS_BROADCAST_EOI         0x1000
  #define APIC_DIRECTED_EOI_BIT                   0x1000000
  
+ /* x2APIC enable bit in REG_APIC_BASE_MSR */
+ #define X2APIC_ENABLE_BIT       10
+ 
  /* IRR register */
  #define APIC_IRR_REG            0x80
  
  /* ISR register */
  #define APIC_ISR_REG            0x40
*** 865,874 ****
--- 868,878 ----
  extern int apic_multi_msi_enable;
  extern int apic_sci_vect;
  extern int apic_hpet_vect;
  extern uchar_t apic_ipls[];
  extern apic_reg_ops_t *apic_reg_ops;
+ extern apic_reg_ops_t local_apic_regs_ops;
  extern apic_mode_t apic_mode;
  extern void x2apic_update_psm();
  extern void apic_change_ops();
  extern void apic_common_send_ipi(int, int);
  extern void apic_set_directed_EOI_handler();