ARM: add SBx81LIFKW board

This is a series of line cards for Allied Telesis's SBx8100 chassis
switch. The CPU block is common to the SBx81GS24a, SBx81XS6, SBx81XS16
and SBx81GT40 cards collectively referred to as SBx81LIFKW in u-boot.

Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/configs/SBx81LIFKW_defconfig b/configs/SBx81LIFKW_defconfig
new file mode 100644
index 0000000..ec9df1a
--- /dev/null
+++ b/configs/SBx81LIFKW_defconfig
@@ -0,0 +1,33 @@
+CONFIG_ARM=y
+CONFIG_KIRKWOOD=y
+CONFIG_SYS_TEXT_BASE=0x00600000
+CONFIG_TARGET_SBx81LIFKW=y
+CONFIG_IDENT_STRING="\nSBx81LIFKW"
+CONFIG_DEFAULT_DEVICE_TREE="kirkwood-atl-sbx81lifkw"
+# CONFIG_SYS_MALLOC_F is not set
+CONFIG_BOOTDELAY=3
+CONFIG_SILENT_CONSOLE=y
+CONFIG_SILENT_U_BOOT_ONLY=y
+CONFIG_HUSH_PARSER=y
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_I2C=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_DHCP=y
+CONFIG_BOOTP_NTPSERVER=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_SNTP=y
+CONFIG_OF_CONTROL=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_DM=y
+CONFIG_DM_GPIO=y
+CONFIG_DM_PCA953X=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_MVTWSI=y
+CONFIG_I2C_MUX=y
+CONFIG_I2C_MUX_PCA954x=y
+# CONFIG_MMC is not set
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_STMICRO=y
+# CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
+CONFIG_SPI=y
+CONFIG_KIRKWOOD_SPI=y