Revert "crypto: aegis128 - add support for SIMD acceleration"

This reverts commit ecc8bc81
("crypto: aegis128 - provide a SIMD implementation based on NEON
intrinsics") and commit 7cdc0ddb


("crypto: aegis128 - add support for SIMD acceleration").

They cause compile errors on platforms other than ARM because
the mechanism to selectively compile the SIMD code is broken.

Repoted-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>