spi/spi-fsl-spi: Make sure in spi_fsl_setup that chipselect becomes inactive

This is needed for a device in SPI_CS_HIGH mode that otherwise could start out
active for the first transaction.
Acked-by: NAnton Vorontsov <anton@enomsg.org>
Signed-off-by: NAndreas Larsson <andreas@gaisler.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

drivers/spi/spi-fsl-spi.c

@@ -387,6 +387,10 @@ static int fsl_spi_setup(struct spi_device *spi)
 		cs->hw_mode = hw_mode; /* Restore settings */
 		return retval;
 	}
+
+	/* Initialize chipselect - might be active for SPI_CS_HIGH mode */
+	fsl_spi_chipselect(spi, BITBANG_CS_INACTIVE);
+
 	return 0;
 }