ia64: mca: drop redundant spinlock initialization

mlogbuf_rlock has declared and initialized by DEFINE_SPINLOCK,
so we don't need to spin_lock_init again, drop it.

Link: https://lkml.kernel.org/r/1652176897-4754-1-git-send-email-baihaowen@meizu.com
Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

arch/ia64/kernel/mca.c

@@ -290,7 +290,6 @@ static void ia64_mlogbuf_finish(int wait)
 {
 	BREAK_LOGLEVEL(console_loglevel);
 
-	spin_lock_init(&mlogbuf_rlock);
 	ia64_mlogbuf_dump();
 	printk(KERN_EMERG "mlogbuf_finish: printing switched to urgent mode, "
 		"MCA/INIT might be dodgy or fail.\n");