tracing: Increase SYNTH_FIELDS_MAX for synthetic_events

Increase the maximum allowed count of synthetic event fields from 16 to 32
in order to allow for larger-than-usual events.

Link: http://lkml.kernel.org/r/20191115091730.9192-1-dedekind1@gmail.comReviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/trace_events_hist.c

@@ -23,7 +23,7 @@
 #include "trace_dynevent.h"
 
 #define SYNTH_SYSTEM		"synthetic"
-#define SYNTH_FIELDS_MAX	16
+#define SYNTH_FIELDS_MAX	32
 
 #define STR_VAR_LEN_MAX		32 /* must be multiple of sizeof(u64) */