[S390] zcrypt: remove BKL

Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/crypto/zcrypt_api.c

@@ -299,9 +299,7 @@ static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
  */
 static int zcrypt_open(struct inode *inode, struct file *filp)
 {
-	lock_kernel();
 	atomic_inc(&zcrypt_open_count);
-	unlock_kernel();
 	return 0;
 }