crypto: msm: fix rfc4309(ccm(aes)) issue on msm-4.4

In newer kernel (msm-4.4 or later), for AEAD ciphering, crypto api has
been re-worked and the assoclen defines the length of association data
and iv together. But for rfc4309(ccm(aes)), iv is not part of AAD.
Therefore, change qcrypto driver to remove the iv, by subtract 8 from
assoclen for rfc4309(ccm(aes)).

Change-Id: I37eb1934d7817b5b5c33440122b68e5d37854960
Signed-off-by: Zhen Kong <zkong@codeaurora.org>