From: Pixel Ding <Pixel.Ding-5C7GfCeVMHo@public.gmane.org>
Subject: [PATCH] drm/amdgpu: right shift 2 bits for
 SDMA_GFX_RB_WPTR_POLL_ADDR_LO
Date: Mon, 25 Sep 2017 14:15:51 +0800
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