spi: imx: fix loopback mode setup after controller reset

If controller hold in reset it's not possible to write any
register except CTRL. So all other registers must be updated
only after controller bring out from reset.
Signed-off-by: NAnton Bondarenko <anton.bondarenko.sama@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-imx.c

@@ -356,6 +356,9 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx,
 	else
 		cfg &= ~MX51_ECSPI_CONFIG_SSBPOL(config->cs);
 
+	/* CTRL register always go first to bring out controller from reset */
+	writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
+
 	reg = readl(spi_imx->base + MX51_ECSPI_TESTREG);
 	if (config->mode & SPI_LOOP)
 		reg |= MX51_ECSPI_TESTREG_LBC;
@@ -363,7 +366,6 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx,
 		reg &= ~MX51_ECSPI_TESTREG_LBC;
 	writel(reg, spi_imx->base + MX51_ECSPI_TESTREG);
 
-	writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
 	writel(cfg, spi_imx->base + MX51_ECSPI_CONFIG);
 
 	/*