Revert "libata: switch to dynamic allocation instead of ata_scsi_rbuf"

This reverts commit a234f7395c9301a5048cb2daa4c86f15c6f02de8.

The commit tried to get rid of the shared global SCSI response buffer.
Unfortunately, it added blocking allocation to atomic path.  Revert it
for now.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
1 file changed