crypto: crct10dif - Accelerated CRC T10 DIF computation with PCLMULQDQ instruction

This is the x86_64 CRC T10 DIF transform accelerated with the PCLMULQDQ
instructions.  Details discussing the implementation can be found in the
paper:

"Fast CRC Computation for Generic Polynomials Using PCLMULQDQ Instruction"
http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdfSigned-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>