um: Remove ia64 cruft

That code is a relict from the early days of UML.
ia64 support was never completed nor worked.
Let's rip it out.
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/Makefile-ia64

-START_ADDR = 0x1000000000000000

arch/um/sys-ia64/Makefile

-OBJ = built-in.o
-
-OBJS =
-
-all: $(OBJ)
-
-$(OBJ): $(OBJS)
-	rm -f $@
-	$(LD) $(LINKFLAGS) --start-group $^ --end-group -o $@
-
-clean-files := $(OBJS) link.ld

arch/um/sys-ia64/sysdep/ptrace.h

-/* 
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SYSDEP_IA64_PTRACE_H
-#define __SYSDEP_IA64_PTRACE_H
-
-struct sys_pt_regs {
-  int foo;
-};
-
-#define EMPTY_REGS { 0 }
-
-#endif
-

arch/um/sys-ia64/sysdep/sigcontext.h

-/* 
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SYSDEP_IA64_SIGCONTEXT_H
-#define __SYSDEP_IA64_SIGCONTEXT_H
-
-#endif
-

arch/um/sys-ia64/sysdep/skas_ptrace.h

-/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SYSDEP_IA64_SKAS_PTRACE_H
-#define __SYSDEP_IA64_SKAS_PTRACE_H
-
-struct ptrace_faultinfo {
-        int is_write;
-        unsigned long addr;
-};
-
-struct ptrace_ldt {
-        int func;
-        void *ptr;
-        unsigned long bytecount;
-};
-
-#define PTRACE_LDT 54
-
-#endif

arch/um/sys-ia64/sysdep/syscalls.h

-/* 
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __SYSDEP_IA64_SYSCALLS_H
-#define __SYSDEP_IA64_SYSCALLS_H
-
-#endif
-