[S390] arch/s390/: Spelling fixes

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/crypto/prng.c

@@ -90,7 +90,7 @@ static ssize_t prng_read(struct file *file, char __user *ubuf, size_t nbytes,
 	int ret = 0;
 	int tmp;
 
-	/* nbytes can be arbitrary long, we spilt it into chunks */
+	/* nbytes can be arbitrary length, we split it into chunks */
 	while (nbytes) {
 		/* same as in extract_entropy_user in random.c */
 		if (need_resched()) {