crypto: testmgr - clean alg_test_null entries in alg_test_descs[]

Currently alg_test_null entries set .suite values to zero, which is unneeded.
So perform clean-up of null test entries.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>