omap: spi: Drop CONFIG_OMAP3_SPI_D0_D1_SWAPPED support

This particular quirk is not enabled in any config files today.  It does
however exist and is handled correctly in device trees and via
CONFIG_DM_SPI.  So we drop the symbol now and add a comment to indicate
that any (new) boards that require this quirk need to enable DM_SPI
instead.

Signed-off-by: Tom Rini <trini@konsulko.com>

drivers/spi/omap3_spi.c

@@ -568,7 +568,8 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	priv->freq = max_hz;
 	priv->mode = mode;
 	priv->wordlen = priv->slave.wordlen;
-#ifdef CONFIG_OMAP3_SPI_D0_D1_SWAPPED
+#if 0
+	/* Please migrate to DM_SPI support for this feature. */
 	priv->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN;
 #endif
 

scripts/config_whitelist.txt

@@ -1981,7 +1981,6 @@ CONFIG_OF_STDOUT_PATH
 CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
 CONFIG_OMAP3_LOGIC_USE_NEW_PRODUCT_ID
 CONFIG_OMAP3_MICRON_DDR
-CONFIG_OMAP3_SPI_D0_D1_SWAPPED
 CONFIG_OMAP_EHCI_PHY1_RESET_GPIO
 CONFIG_OMAP_EHCI_PHY2_RESET_GPIO
 CONFIG_OMAP_EHCI_PHY3_RESET_GPIO