block: row: hardcode values research by the community, you guys know who you are.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>

Conflicts:
	block/row-iosched.c
Makefile: -03 optimization
block: row: this should be 2.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
Added optimized CRC32 algorithm.