lib/test_rhashtable: fix spelling mistake "existant" -> "existent"

There are spelling mistakes in warning macro messages. Fix them.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

lib/test_rhashtable.c

@@ -395,7 +395,7 @@ static int __init test_rhltable(unsigned int entries)
 			if (WARN(err, "cannot remove element at slot %d", i))
 				continue;
 		} else {
-			if (WARN(err != -ENOENT, "removed non-existant element %d, error %d not %d",
+			if (WARN(err != -ENOENT, "removed non-existent element %d, error %d not %d",
 			     i, err, -ENOENT))
 				continue;
 		}
@@ -440,7 +440,7 @@ static int __init test_rhltable(unsigned int entries)
 			if (WARN(err, "cannot remove element at slot %d", i))
 				continue;
 		} else {
-			if (WARN(err != -ENOENT, "removed non-existant element, error %d not %d",
+			if (WARN(err != -ENOENT, "removed non-existent element, error %d not %d",
 				 err, -ENOENT))
 			continue;
 		}