tracing: Eliminate duplicate TRACE_GRAPH_PRINT_xx defines

Eliminate duplicate TRACE_GRAPH_PRINT_xx defines
in trace_functions_graph.c that are already in
trace.h.

Add TRACE_GRAPH_PRINT_IRQS to trace.h, which is
the only one that is missing.

Link: http://lkml.kernel.org/p/20140520221031.8359.24733.stgit@beardog.cce.hp.com



Signed-off-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>