tracing/events: fix a typo in __string() format output

"tsize" should be "\tsize". Also remove the space before "__str_loc".

Before:
 # cat tracing/events/irq/irq_handler_entry/format
        ...
        field:int irq;  offset:12;      size:4;
        field: __str_loc name;  offset:16;tsize:2;
        ...

After:
 # cat tracing/events/irq/irq_handler_entry/format
	...
        field:int irq;  offset:12;      size:4;
        field:__str_loc name;   offset:16;      size:2;
	...

[ Impact: standardize __string field description in events format file ]
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

include/trace/ftrace.h

@@ -209,8 +209,8 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 
 #undef __string
 #define __string(item, src)						       \
-	ret = trace_seq_printf(s, "\tfield: __str_loc " #item ";\t"	       \
-			       "offset:%u;tsize:%u;\n",			       \
+	ret = trace_seq_printf(s, "\tfield:__str_loc " #item ";\t"	       \
+			       "offset:%u;\tsize:%u;\n",		       \
 			       (unsigned int)offsetof(typeof(field),	       \
 					__str_loc_##item),		       \
 			       (unsigned int)sizeof(field.__str_loc_##item));  \