configs: mx6sabresd: Add DM_SPI_FLASH necessary configs

Enable all neceassary configs to support DM_SPI_FLASH on mx6sabresd.

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/mx6sabresd_defconfig b/configs/mx6sabresd_defconfig
index 916ade1..80c01f2 100644
--- a/configs/mx6sabresd_defconfig
+++ b/configs/mx6sabresd_defconfig
@@ -71,6 +71,7 @@
 CONFIG_DM_GPIO=y
 CONFIG_DM_MMC=y
 CONFIG_FSL_ESDHC=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PHYLIB=y
@@ -78,6 +79,7 @@
 CONFIG_PCI=y
 CONFIG_DM_REGULATOR=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y