spi: fsl-espi: remove usage of mpc8xxx_spi->flags

Change the check to access property "mode" directly.
This allows us to get rid of mpc8xxx_spi->flags in a subsequent
patch in this patch series as it's used nowhere else.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-fsl-espi.c

@@ -620,12 +620,6 @@ static int fsl_espi_probe(struct device *dev, struct resource *mem,
 	if (ret)
 		goto err_probe;
 
-	if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
-		dev_err(dev, "SPI_QE_CPU_MODE is not supported on ESPI!\n");
-		ret = -EINVAL;
-		goto err_probe;
-	}
-
 	/* SPI controller initializations */
 	fsl_espi_write_reg(mpc8xxx_spi, ESPI_SPMODE, 0);
 	fsl_espi_write_reg(mpc8xxx_spi, ESPI_SPIM, 0);
@@ -715,6 +709,11 @@ static int of_fsl_espi_probe(struct platform_device *ofdev)
 	unsigned int irq, num_cs;
 	int ret;
 
+	if (of_property_read_bool(np, "mode")) {
+		dev_err(dev, "mode property is not supported on ESPI!\n");
+		return -EINVAL;
+	}
+
 	ret = of_mpc8xxx_spi_probe(ofdev);
 	if (ret)
 		return ret;