crypto: caam - desc.h fixes

1. fix HDR_START_IDX_MASK, HDR_SD_SHARE_MASK, HDR_JD_SHARE_MASK
Define HDR_START_IDX_MASK consistently with the other masks:
mask = bitmask << offset

2. OP_ALG_TYPE_CLASS1 and OP_ALG_TYPE_CLASS2 must be shifted.

3. fix FIFO_STORE output data type value for AFHA S-Box

4. fix OPERATION pkha modular arithmetic source mask

5. rename LDST_SRCDST_WORD_CLASS1_ICV_SZ to
LDST_SRCDST_WORD_CLASS1_IV_SZ (it refers to IV, not ICV).

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>