sparc32: Kill unused defines from asm/head_32.h

#define __SPARC_HEAD_H

#define KERNBASE        0xf0000000  /* First address the kernel will eventually be */

#define LOAD_ADDR       0x4000      /* prom jumps to us here unless this is elf /boot */

#define SUN4C_SEGSZ     (1 << 18)

#define SRMMU_L1_KBASE_OFFSET ((KERNBASE>>24)<<2)  /* Used in boot remapping. */

#define INTS_ENAB        0x01           /* entry.S uses this. */

#define SUN4_PROM_VECTOR 0xFFE81000     /* SUN4 PROM needs to be hardwired */

#define WRITE_PAUSE      nop; nop; nop; /* Have to do this after %wim/%psr chg */

#define NOP_INSN         0x01000000     /* Used to patch sparc_save_state */

/* Here are some trap goodies */