drm/radeon/cik: use POLL_REG_MEM special op for sDMA HDP flush
authorAlex Deucher <alexander.deucher@amd.com>
Thu, 9 Jan 2014 21:35:39 +0000 (16:35 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Mon, 20 Jan 2014 17:05:14 +0000 (12:05 -0500)
This is the preferred flushing method on CIK.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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