linux-aspeed: Enable XDMA

Somehow this was not enabled. It is required for Witherspoon 128, Tacoma
and Rainier.

Change-Id: I0022fda5411e99ee688a887c4da062116ccf5b10
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/recipes-kernel/linux/linux-aspeed/aspeed-g5/defconfig b/recipes-kernel/linux/linux-aspeed/aspeed-g5/defconfig
index f74ed83..810a381 100644
--- a/recipes-kernel/linux/linux-aspeed/aspeed-g5/defconfig
+++ b/recipes-kernel/linux/linux-aspeed/aspeed-g5/defconfig
@@ -204,6 +204,7 @@
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_ASPEED_LPC_CTRL=y
 CONFIG_ASPEED_LPC_SNOOP=y
+CONFIG_ASPEED_XDMA=y
 CONFIG_IIO=y
 CONFIG_ASPEED_ADC=y
 CONFIG_MAX1363=y
diff --git a/recipes-kernel/linux/linux-aspeed/aspeed-g6/defconfig b/recipes-kernel/linux/linux-aspeed/aspeed-g6/defconfig
index d62b3a9..4aa6b04 100644
--- a/recipes-kernel/linux/linux-aspeed/aspeed-g6/defconfig
+++ b/recipes-kernel/linux/linux-aspeed/aspeed-g6/defconfig
@@ -236,6 +236,7 @@
 CONFIG_ASPEED_LPC_CTRL=y
 CONFIG_ASPEED_LPC_SNOOP=y
 CONFIG_ASPEED_P2A_CTRL=y
+CONFIG_ASPEED_XDMA=y
 CONFIG_IIO=y
 CONFIG_ASPEED_ADC=y
 CONFIG_MAX1363=y