defconfig: k2g_evm_defconfig: enable SPI driver model

Enable SPI and SPI Flash driver model as K2G SPI controller driver
supports driver model.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>
diff --git a/configs/k2g_evm_defconfig b/configs/k2g_evm_defconfig
index 8efa58c..802eeee 100644
--- a/configs/k2g_evm_defconfig
+++ b/configs/k2g_evm_defconfig
@@ -27,6 +27,8 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
 CONFIG_DM=y
+CONFIG_DM_SPI=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_DM_ETH=y