spi: tegra: Increase delay between CS and clock start

Some SPI devices require a delay between the CS and when the clock
starts.  Increase SS_SETUP to accommodate these devices.

Change-Id: I301e3583e70c722cadde5a9f91119881805dd3a5
Signed-off-by: Greg Meiste <w30289@motorola.com>

drivers/spi/spi_tegra.c

@@ -274,6 +274,7 @@ static void spi_tegra_start_transfer(struct spi_device *spi,
 		val |= SLINK_TXEN;
 	val |= SLINK_SS_EN_CS(spi->chip_select);
 	val |= SLINK_SPIE;
+	val |= SLINK_SS_SETUP(3);
 	spi_tegra_writel(tspi, val, SLINK_COMMAND2);
 
 	val = spi_tegra_readl(tspi, SLINK_COMMAND);