Turn off periodic GPE time stamp traces

Change-Id: I81293497750bc3dc3ec77c74163d97f04b0eda8c
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/36370
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christopher J. Cain <cjcain@us.ibm.com>
Reviewed-by: Martha Broyles <mbroyles@us.ibm.com>
Reviewed-by: Wael El-Essawy <welessa@us.ibm.com>

src/common/global_app_cfg.h

@@ -5,7 +5,7 @@
 /*                                                                        */
 /* OpenPOWER OnChipController Project                                     */
 /*                                                                        */
-/* Contributors Listed Below - COPYRIGHT 2015,2016                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2017                        */
 /* [+] International Business Machines Corp.                              */
 /*                                                                        */
 /*                                                                        */
@@ -31,6 +31,9 @@
 #define DEFAULT_NEST_FREQ_HZ 600000000
 #define DEFAULT_EXT_CLK_FREQ_HZ 37500000
 
+// Turn off periodic GPE traces
+#define PK_TRACE_TIMER_OUTPUT 0
+
 // If we are using the OCB timebase then assume
 // a frequency of 37.5Mhz.  Otherwise, the default is to use
 // the decrementer as a timebase and assume a frequency of