Fix response length in AEAD proto serializer

The packed-c serializer for the AEAD crypto extension was setting
an incorrect response length in serialize_aead_finish_resp().
This commit fixes the returned length.

Signed-off-by: Julian Hall <julian.hall@arm.com>
Change-Id: I15076ccbd450752ebb2d9b0820f53837edf74da7
1 file changed