configs: mx6sabreauto: Add DM_SPI_FLASH necessary configs

Enable all neceassary configs to support DM_SPI_FLASH on mx6sabreauto.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/configs/mx6sabreauto_defconfig b/configs/mx6sabreauto_defconfig
index f692d1b..f51b5af 100644
--- a/configs/mx6sabreauto_defconfig
+++ b/configs/mx6sabreauto_defconfig
@@ -62,12 +62,14 @@
 CONFIG_FSL_ESDHC=y
 CONFIG_NAND=y
 CONFIG_NAND_MXS=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PHYLIB=y
 CONFIG_MII=y
 CONFIG_DM_REGULATOR=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y