interrupt_controller/loapic_intr.c: remove unused MPtables constants

#define MODE_STARTUP 0x6   /* delivery mode: StartUp */

#define STATUS_PEND 0x1000 /* delivery status: Pend */

/* MP Configuration Table Entries */

#define MP_ENTRY_CPU 0	 /* Entry Type: CPU */

#define MP_ENTRY_BUS 1	 /* Entry Type: BUS */

#define MP_ENTRY_IOAPIC 2      /* Entry Type: IO APIC */

#define MP_ENTRY_IOINTERRUPT 3 /* Entry Type: IO INT */

#define MP_ENTRY_LOINTERRUPT 4 /* Entry Type: LO INT */

/* Extended MP Configuration Table Entries */

#define EXT_MP_ENTRY_SASM 128  /* Entry Type: System Address Space Map */

#define EXT_MP_ENTRY_BHD 129   /* Entry Type: Bus Hierarchy Descriptor */

#define EXT_MP_ENTRY_CBASM 130 /* Entry Type: Comp Address Space Modifier */

/* MP Configuration Table CPU Flags */

#define MP_CPU_FLAGS_BP 0x02

/* IMCR related bits */

#define IMCR_ADRS 0x22       /* IMCR addr reg */