Bring back LX zones.

*** 378,388 ****
  #define APIC_SPUR_INTR          0xFF
  
  /* special or reserve vectors */
  #define APIC_CHECK_RESERVE_VECTORS(v) \
          (((v) == T_FASTTRAP) || ((v) == APIC_SPUR_INTR) || \
!         ((v) == T_SYSCALLINT) || ((v) == T_DTRACE_RET))
  
  /* cmos shutdown code for BIOS                                          */
  #define BIOS_SHUTDOWN           0x0a
  
  /* define the entry types for BIOS information tables as defined in PC+MP */
--- 378,388 ----
  #define APIC_SPUR_INTR          0xFF
  
  /* special or reserve vectors */
  #define APIC_CHECK_RESERVE_VECTORS(v) \
          (((v) == T_FASTTRAP) || ((v) == APIC_SPUR_INTR) || \
!         ((v) == T_SYSCALLINT) || ((v) == T_DTRACE_RET) || ((v) == 0x80))
  
  /* cmos shutdown code for BIOS                                          */
  #define BIOS_SHUTDOWN           0x0a
  
  /* define the entry types for BIOS information tables as defined in PC+MP */