selinux: remove load size limit

Load size was limited to 64MB, this was legacy limitation due to vmalloc()
which was removed a while ago.
Signed-off-by: zhanglin <zhang.lin16@zte.com.cn>
[PM: removed comments in the description about 'real world use cases']
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/selinuxfs.c

@@ -548,10 +548,6 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
 	if (*ppos != 0)
 		goto out;
 
-	length = -EFBIG;
-	if (count > 64 * 1024 * 1024)
-		goto out;
-
 	length = -ENOMEM;
 	data = vmalloc(count);
 	if (!data)