sparc64: DAX request to dequeue half of a long CCB should not succeed

sparc64: DAX request to dequeue half of a long CCB should not succeed

Orabug: 25827254

When a dequeue call is made to the driver such that the last CCB in the
request is the first half of a long ccb, the driver does not report an
error and releases the BIP buffer for the CCBs dequeued up until then.
This was detected by a ioctl_test23 written by Stanislav specifically to
validate the above scenario.

This bug fix addresses both the above issues.

Reviewed-by: Rob Gardner <rob.gardner@oracle.com>
Signed-off-by: Sanath Kumar <sanath.s.kumar@oracle.com>
Signed-off-by: Allen Pais <allen.pais@oracle.com>