ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

It is possible for dma_request_chan() to return EPROBE_DEFER, which
means acdev->host->dev is not ready yet. At this point dev_err() will
have no output. Use dev_err_probe() instead.

Signed-off-by: Minjie Du <[e-mail]>
Acked-by: Viresh Kumar <[e-mail]>
Reviewed-by: Sergey Shtylyov <[e-mail]>
Signed-off-by: Damien Le Moal <[e-mail]>

drivers/ata/pata_arasan_cf.c

···
 	/* dma_request_channel may sleep, so calling from process context */
 	acdev->dma_chan = dma_request_chan(acdev->host->dev, "data");
 	if (IS_ERR(acdev->dma_chan)) {
-		dev_err(acdev->host->dev, "Unable to get dma_chan\n");
+		dev_err_probe(acdev->host->dev, PTR_ERR(acdev->dma_chan),
+			      "Unable to get dma_chan\n");
 		acdev->dma_chan = NULL;
 		goto chan_request_fail;
 	}