spi: img-spfi: Enable controller before starting TX DMA

It is recommended that the SPFI controller be enabled (i.e. setting
SPFI_EN in SPFI_CONTROL) before TX DMA begins.
Signed-off-by: NAndrew Bresticker <abrestic@chromium.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-img-spfi.c

@@ -390,14 +390,14 @@ static int img_spfi_start_dma(struct spi_master *master,
 		dma_async_issue_pending(spfi->rx_ch);
 	}
 
+	spfi_start(spfi);
+
 	if (xfer->tx_buf) {
 		spfi->tx_dma_busy = true;
 		dmaengine_submit(txdesc);
 		dma_async_issue_pending(spfi->tx_ch);
 	}
 
-	spfi_start(spfi);
-
 	return 1;
 
 stop_dma: