meta-bletchley: enable kernel loadable module support

In order to add mdio-tools and mdio-netlink package, enable kernel
loadable module support.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: I7ce0634fdac5e2e400c3eded32ab9fe490794fb4
diff --git a/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg b/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
index 9b7609c..0601802 100644
--- a/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
+++ b/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
@@ -44,3 +44,5 @@
 CONFIG_IPMI_HANDLER=y
 CONFIG_IPMI_DEVICE_INTERFACE=y
 CONFIG_IPMB_DEVICE_INTERFACE=y
+# Enable loadable module
+CONFIG_MODULES=y