test_rhashtable: Use rhashtable max_size instead of max_shift

This patch converts test_rhashtable to use rhashtable max_size
instead of the obsolete max_shift.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

lib/test_rhashtable.c

@@ -201,7 +201,7 @@ static int __init test_rht_init(void)
 		.key_offset = offsetof(struct test_obj, value),
 		.key_len = sizeof(int),
 		.hashfn = jhash,
-		.max_shift = 1, /* we expand/shrink manually here */
+		.max_size = 2, /* we expand/shrink manually here */
 		.nulls_base = (3U << RHT_BASE_SHIFT),
 	};
 	int err;