commit 99a09238 upstream.

Using the wrong watermwark value for the secondary
watermark.  Copy paste typo.  Noticed by Mykola.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>