sym 2.1.18j:
 - Add SPI transport attributes (James Bottomley)
 - Use generic code to do Domain Validation (James Bottomley)
 - Stop using scsi_to_pci_dma_dir() (Christoph Hellwig)
 - Change some constants to their symbolic names (Grant Grundler)
 - Handle a race between a postponed command completing and the EH retrying
   it (James Bottomley)
 - If the auto request sense fails, issue a device reset (James Bottomley)