The watermark reg for the third pipe is in an unusual offset; add
support for it and set watermarks for 3 pipe configs.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>