sched/cpufreq: Use %pe format for PTR_ERR() printing

Use %pe format specifier for printing PTR_ERR() error values
to make error messages more readable.

Found by Coccinelle:
./cpufreq_schedutil.c:685:49-56: WARNING: Consider using %pe to print PTR_ERR()

Signed-off-by: zenghongling <zenghongling@kylinos.cn>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260120083333.148385-1-zenghongling@kylinos.cn

Author: zenghongling0719

kernel/sched/cpufreq_schedutil.c

@@ -682,7 +682,7 @@ static int sugov_kthread_create(struct sugov_policy *sg_policy)
 				"sugov:%d",
 				cpumask_first(policy->related_cpus));
 	if (IS_ERR(thread)) {
-		pr_err("failed to create sugov thread: %ld\n", PTR_ERR(thread));
+		pr_err("failed to create sugov thread: %pe\n", thread);
 		return PTR_ERR(thread);
 	}