powerpc: Rename set_break to avoid naming conflict

With allmodconfig we are getting:
  drivers/tty/synclink_gt.c:160:12: error: conflicting types for 'set_break'
  arch/powerpc/include/asm/debug.h:49:5: note: previous declaration of 'set_break' was here

  drivers/tty/synclinkmp.c:526:12: error: conflicting types for 'set_break'
  arch/powerpc/include/asm/debug.h:49:5: note: previous declaration of 'set_break' was here

This renames set_break to set_breakpoint to avoid this naming conflict

Signed-off-by: Michael Neuling <mikey@neuling.org>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index c7483d0..2a3e8dd 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -73,7 +73,7 @@
 	 * If so, DABR will be populated in single_step_dabr_instruction().
 	 */
 	if (current->thread.last_hit_ubp != bp)
-		set_break(info);
+		set_breakpoint(info);
 
 	return 0;
 }
@@ -191,7 +191,7 @@
 
 	info = counter_arch_bp(tsk->thread.last_hit_ubp);
 	regs->msr &= ~MSR_SE;
-	set_break(info);
+	set_breakpoint(info);
 	tsk->thread.last_hit_ubp = NULL;
 }
 
@@ -276,7 +276,7 @@
 	if (!(info->type & HW_BRK_TYPE_EXTRANEOUS_IRQ))
 		perf_bp_event(bp, regs);
 
-	set_break(info);
+	set_breakpoint(info);
 out:
 	rcu_read_unlock();
 	return rc;
@@ -308,7 +308,7 @@
 	if (!(info->type & HW_BRK_TYPE_EXTRANEOUS_IRQ))
 		perf_bp_event(bp, regs);
 
-	set_break(info);
+	set_breakpoint(info);
 	current->thread.last_hit_ubp = NULL;
 
 	/*