scsi/da: Only send SYNC CACHE for devices with mode page 8

[imp]

Summary

Mode page 8 is the 'cache' mode page. It's used to control the cache,
if one is present, on a device. When it is absent, that's a very
strong hint that SYNCHRONIZED CACHE willl not be necessary. Set the
NO_SYNC_CACHE quirk for this situation.

[imp]

Mask the page number off, otherwise we'll reject valid pages with high bits set.