sparc64: remove sparc64_install_isr_entries and its callers.

sparc64_install_isr_entries function is no longer used. Removing it also
allows to use the default bsppredriverhook for usiii and bspstart for niagara.

c/src/lib/libcpu/sparc64/Makefile.am

@@ -25,11 +25,6 @@ shared_sparc64_syscall_rel_SOURCES = shared/syscall/sparc64-syscall.S \
 shared_sparc64_syscall_rel_CPPFLAGS = $(AM_CPPFLAGS)
 shared_sparc64_syscall_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
 
-noinst_PROGRAMS += shared/interrupts.rel
-shared_interrupts_rel_SOURCES = shared/interrupts/installisrentries.c
-shared_interrupts_rel_CPPFLAGS = $(AM_CPPFLAGS) -I$(srcdir)/shared/interrupts
-shared_interrupts_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
-
 noinst_PROGRAMS += shared/cache.rel
 shared_cache_rel_SOURCES = shared/cache/cache.c shared/cache/cache_.h \
     ../shared/src/cache_aligned_malloc.c ../shared/src/cache_manager.c

c/src/lib/libcpu/sparc64/shared/interrupts/installisrentries.c

@@ -1,21 +0,0 @@
-/*
- *  Install trap handlers for handling software interrupts.
- *  This file is deprecated, as the trap handlers are needed before this 
- *  function is called. We still use this as for debugging purposes.
- *
- *  Copyright 2010 Gedare Bloom.
- *
- *  The license and distribution terms for this file may be
- *  found in the file LICENSE in this distribution or at
- *  http://www.rtems.org/license/LICENSE.
- */
-
-#include <rtems.h>
-#include <rtems/asm.h>
-#include <rtems/score/sparc64.h>
-#include <rtems/bspIo.h>
-
-void sparc64_install_isr_entries( void )
-{
-  return;
-}

c/src/lib/libcpu/sparc64/shared/score/cpu.c

@@ -100,7 +100,6 @@ uint32_t   _CPU_ISR_Get_level( void )
  *  a synchronous trap.  This will avoid the executive changing the return
  *  address.
  */
-/*  Verified this is working properly from sparc64_install_isr_entries */
 void _CPU_ISR_install_raw_handler(
   uint32_t    vector,
   proc_ptr    new_handler,