Expand the transform API to allow transports to return 'success' for the command.  Make UFI devices return 'success' when asked to do a SYNC_CACHE.  There's no support for write caching in the UFI spec, so this is the most appropriate action to undertake.
Expand the transform API to allow transports to return 'success' for
the command.  Make UFI devices return 'success' when asked to do a
SYNC_CACHE.  There's no support for write caching in the UFI spec, so
this is the most appropriate action to undertake.

Reviewed by: scottl
Approved by: re@ (blanket)

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