panic: skip get_random_bytes for RT_FULL in init_oops_id

Disable on -RT. If this is invoked from irq-context we will have problems
to acquire the sleeping lock.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/panic.c

@@ -521,9 +521,11 @@ static u64 oops_id;
 
 static int init_oops_id(void)
 {
+#ifndef CONFIG_PREEMPT_RT
 	if (!oops_id)
 		get_random_bytes(&oops_id, sizeof(oops_id));
 	else
+#endif
 		oops_id++;
 
 	return 0;