tracing: function graph tracer, fix

fix return-tracer => graph-tracer namespace rename fallout.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 2b1f0f0..7def9fd 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1189,7 +1189,7 @@
 	cmpl $ftrace_stub, ftrace_trace_function
 	jnz trace
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
-	cmpl $ftrace_stub, ftrace_graph_function
+	cmpl $ftrace_stub, ftrace_graph_return
 	jnz ftrace_graph_caller
 #endif
 .globl ftrace_stub