meta-ibm: witherspoon: Explictly enable UBI features

Witherspoon requires UBI support in the kernel.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Change-Id: Ifec95ca16bdf1792d68b2167e0d53f44e2f09239
diff --git a/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg b/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg
index d0d1c6f..3635142 100644
--- a/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg
+++ b/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg
@@ -7,6 +7,10 @@
 CONFIG_IIO=y
 CONFIG_BMP280=y
 CONFIG_MAGIC_SYSRQ=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_FASTMAP=y
+CONFIG_MTD_UBI_BLOCK=y
+CONFIG_UBIFS_FS=y
 
 # CONFIG_BROADCOM_PHY is not set
 # CONFIG_REALTEK_PHY is not set