libata: Implement NCQ autosense

Some newer devices support NCQ autosense (cf ACS-4), so we should
be using it to retrieve the sense code and speed up recovery.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --cc drivers/ata/libata-eh.c
Simple merge

diff --cc drivers/ata/libata-scsi.c
Simple merge

diff --cc drivers/ata/libata.h
Simple merge

diff --cc include/linux/ata.h
Simple merge