support chained scatterlists for aead, ablkcipher and ahash.
Signed-off-by: NYuan Kang <Yuan.Kang@freescale.com>

- fix dma unmap leak
- un-unlikely src == dst, due to experience with AF_ALG
Signed-off-by: NKudupudi Ugendreshwar <B38865@freescale.com>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

caam supports ahash hmac with sha algorithms and md5.
Signed-off-by: NYuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

- rename scatterlist and link_tbl functions
- link_tbl changed to sec4_sg
- sg_to_link_tbl_one changed to dma_to_sec4_sg_one,
  since no scatterlist is use
Signed-off-by: NYuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

create separate files for split key generation and scatterlist functions.
Signed-off-by: NYuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>