arm: kirkwood: configs: Convert Allied Telesis boards to DM_SPI

Enable CONFIG_DM_SPI=y and CONFIG_DM_SPI_FLASH=y in the defconfig.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/configs/SBx81LIFKW_defconfig b/configs/SBx81LIFKW_defconfig
index 99526c1..e0ce159 100644
--- a/configs/SBx81LIFKW_defconfig
+++ b/configs/SBx81LIFKW_defconfig
@@ -28,6 +28,7 @@
 CONFIG_I2C_MUX=y
 CONFIG_I2C_MUX_PCA954x=y
 # CONFIG_MMC is not set
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
@@ -40,4 +41,5 @@
 CONFIG_DM_RTC=y
 CONFIG_RTC_MV=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_KIRKWOOD_SPI=y