spi: topcliff-pch: Update error messages for dmaengine_prep_slave_sg() API

Commit 16052827d98fbc13c31ebad560af4bd53e2b4dd5 ("dmaengine/dma_slave:
introduce inline wrappers") changed the code to use the new API, but forgot
to update the error messages.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
--
v2:
  - New
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-topcliff-pch.c

@@ -1047,8 +1047,8 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
 					num, DMA_DEV_TO_MEM,
 					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 	if (!desc_rx) {
-		dev_err(&data->master->dev, "%s:device_prep_slave_sg Failed\n",
-			__func__);
+		dev_err(&data->master->dev,
+			"%s:dmaengine_prep_slave_sg Failed\n", __func__);
 		return;
 	}
 	dma_sync_sg_for_device(&data->master->dev, sg, num, DMA_FROM_DEVICE);
@@ -1106,8 +1106,8 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
 					sg, num, DMA_MEM_TO_DEV,
 					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 	if (!desc_tx) {
-		dev_err(&data->master->dev, "%s:device_prep_slave_sg Failed\n",
-			__func__);
+		dev_err(&data->master->dev,
+			"%s:dmaengine_prep_slave_sg Failed\n", __func__);
 		return;
 	}
 	dma_sync_sg_for_device(&data->master->dev, sg, num, DMA_TO_DEVICE);