tracing/events: add missing type info of dynamic arrays

The format file doesn't contain enough information for
__dynamic_array/__string. The type name is missing.

Before:
  # cat format:
  name: irq_handler_entry
  ...
          field:__data_loc name;  offset:16;      size:2;

After:
  # cat format:
  name: irq_handler_entry
  ...
          field:__data_loc char[] name;  offset:16;      size:2;

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4A5E962E.9020900@cn.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

include/trace/ftrace.h

@@ -120,7 +120,7 @@
 
 #undef __dynamic_array
 #define __dynamic_array(type, item, len)				       \
-	ret = trace_seq_printf(s, "\tfield:__data_loc " #item ";\t"	       \
+	ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\
 			       "offset:%u;\tsize:%u;\n",		       \
 			       (unsigned int)offsetof(typeof(field),	       \
 					__data_loc_##item),		       \
@@ -279,7 +279,7 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 
 #undef __dynamic_array
 #define __dynamic_array(type, item, len)				       \
-	ret = trace_define_field(event_call, "__data_loc" "[" #type "]", #item,\
+	ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 				offsetof(typeof(field), __data_loc_##item),    \
 				 sizeof(field.__data_loc_##item), 0);