LoongArch: Delete unnecessary debugfs checking

Debugfs functions are not supposed to be checked for errors.  This
is sort of unusual but it is described in the comments for the
debugfs_create_dir() function.  Also debugfs_create_dir() can never
return NULL.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

arch/loongarch/kernel/unaligned.c

@@ -485,8 +485,6 @@ static int __init debugfs_unaligned(void)
 	struct dentry *d;
 
 	d = debugfs_create_dir("loongarch", NULL);
-	if (IS_ERR_OR_NULL(d))
-		return -ENOMEM;
 
 	debugfs_create_u32("unaligned_instructions_user",
 				S_IRUGO, d, &unaligned_instructions_user);