crypto: aesni - Move back to module_init

This patch reverts commit 0fbafd06
("crypto: aesni - fix failing setkey for rfc4106-gcm-aesni") by
moving the aesni init function back to module_init from late_initcall.

The original patch was needed because tests were synchronous.  This
is no longer the case so there is no need to postpone the registration.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>