drm/amdgpu: Don't print error on aux transaction timeouts

Since it's normal for DRM to retry our aux transaction helpers multiple
times in a row, up to 32 times for each attempted transaction, we're
making a lot of noise that is no longer necessary now that DRM will just
print the return code we give it.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Lyude <cpaul@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -88,7 +88,6 @@ static int amdgpu_atombios_dp_process_aux_ch(struct amdgpu_i2c_chan *chan,
 
 	/* timeout */
 	if (args.v2.ucReplyStatus == 1) {
-		DRM_DEBUG_KMS("dp_aux_ch timeout\n");
 		r = -ETIMEDOUT;
 		goto done;
 	}