arm: mvebu: x240: Enable IPV6 support

Enable IPV6 support for the x240 board.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/x240_defconfig b/configs/x240_defconfig
index 5e5b467..ff64916 100644
--- a/configs/x240_defconfig
+++ b/configs/x240_defconfig
@@ -32,6 +32,7 @@
 CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_UBI=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_IPV6=y
 CONFIG_CLK=y
 CONFIG_CLK_MVEBU=y
 CONFIG_GPIO_HOG=y