[IA64] remove duplicate code from arch_ptrace()

Remove all code which does exactly the same thing as ptrace_request().

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index 5b52340..4b2a8d4 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -312,6 +312,13 @@
   #define arch_ptrace_attach(child) \
 	ptrace_attach_sync_user_rbs(child)
 
+  #define arch_has_single_step()  (1)
+  extern void user_enable_single_step(struct task_struct *);
+  extern void user_disable_single_step(struct task_struct *);
+
+  #define arch_has_block_step()   (1)
+  extern void user_enable_block_step(struct task_struct *);
+
 #endif /* !__KERNEL__ */
 
 /* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */