block:Add BFQ ioscheduler

Signed-off-by: zeroblade1984 <zeroblade1984@gmail.com>
block:Add FIOPS ioscheduler

Signed-off-by: zeroblade1984 <zeroblade1984@gmail.com>
block:Add SIO ioscheduler

Signed-off-by: zeroblade1984 <zeroblade1984@gmail.com>
drivers:scsi:Remove SCSI wait scan
This is dated back with the 2.6.x kernels and is found to be not used anymore on newer kernel versions.

Signed-off-by: zeroblade1984 <zeroblade1984@gmail.com>