ftrace: fix trace_nop config select

Impact: build fix on non-function-tracing architectures

The trace_nop is the tracer that is defined when no tracer is set in
the ftrace infrastructure.

The trace_nop was mistakenly selected by HAVE_FTRACE due to the confusion
between ftrace infrastructure and the ftrace function tracer (which has
been solved by renaming the function tracer).

This patch changes the select to the approriate TRACING.

This patch should fix compile errors on architectures that do not define
the FUNCTION_TRACER.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/trace/Kconfig

@@ -8,7 +8,6 @@ config NOP_TRACER
 
 config HAVE_FUNCTION_TRACER
 	bool
-	select NOP_TRACER
 
 config HAVE_DYNAMIC_FTRACE
 	bool
@@ -28,6 +27,7 @@ config TRACING
 	select RING_BUFFER
 	select STACKTRACE
 	select TRACEPOINTS
+	select NOP_TRACER
 
 menu "Tracers"