tracepoint: Print the function symbol when tracepoint_debug is set

When tracepoint_debug is set, we may get the output in kernel log:
     [  380.013843] Probe 0 : 00000000f0d68cda

It is not readable, so change to print the function symbol.
After this patch, the output may becomes:
     [   55.225555] Probe 0 : perf_trace_sched_wakeup_template+0x0/0x20

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Huang Shijie <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>

Author: HuangShijie2024

kernel/tracepoint.c

@@ -127,7 +127,7 @@ static void debug_print_probes(struct tracepoint_func *funcs)
 		return;
 
 	for (i = 0; funcs[i].func; i++)
-		printk(KERN_DEBUG "Probe %d : %p\n", i, funcs[i].func);
+		printk(KERN_DEBUG "Probe %d : %pSb\n", i, funcs[i].func);
 }
 
 static struct tracepoint_func *