iaa_crypto depends on the deflate compression algorithm that's provided
by deflate.

If the algorithm is not available because CRYPTO_DEFLATE=m and deflate
is not inserted, iaa_crypto will request "crypto-deflate-generic".
Deflate will not be inserted because "crypto-deflate-generic" is not a
valid alias.

Add deflate-generic and crypto-deflate-generic aliases to deflate.

Signed-off-by: Kyle Meyer <kyle.meyer@hpe.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>