floppy/scsi: fix setting of BIO flags

Fix setting bio flags in drivers (sd_dif/floppy).

Signed-off-by: Muthukumar R <muthur@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>