drm/amdgpu: fix SDMA hdp flush engine conflict

Each of HDP flush engine should be used by one ring, correct allocate of
hdp flush engine to SDMA ring.
Correct me value of each SDMA ring, as it was cleared when init microcode.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c

@@ -391,10 +391,7 @@ static void sdma_v5_2_ring_emit_hdp_flush(struct amdgpu_ring *ring)
 	u32 ref_and_mask = 0;
 	const struct nbio_hdp_flush_reg *nbio_hf_reg = adev->nbio.hdp_flush_reg;
 
-	if (ring->me == 0)
-		ref_and_mask = nbio_hf_reg->ref_and_mask_sdma0;
-	else
-		ref_and_mask = nbio_hf_reg->ref_and_mask_sdma1;
+	ref_and_mask = nbio_hf_reg->ref_and_mask_sdma0 << ring->me;
 
 	amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_POLL_REGMEM) |
 			  SDMA_PKT_POLL_REGMEM_HEADER_HDP_FLUSH(1) |
@@ -1224,6 +1221,7 @@ static int sdma_v5_2_sw_init(void *handle)
 		ring = &adev->sdma.instance[i].ring;
 		ring->ring_obj = NULL;
 		ring->use_doorbell = true;
+		ring->me = i;
 
 		DRM_INFO("use_doorbell being set to: [%s]\n",
 				ring->use_doorbell?"true":"false");