meta-ibm: witherspoon: Enable magic sysrq

Currently required for the debug-trigger application.

Change-Id: I585ccc5591b3f66db41bfd9799df05cec902403d
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg b/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg
index 9d5ebfb..0b6a2e8 100644
--- a/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg
+++ b/meta-ibm/recipes-kernel/linux/linux-aspeed/witherspoon.cfg
@@ -8,3 +8,4 @@
 CONFIG_IPMI_KCS_BMC=y
 CONFIG_IPMI_KCS_BMC_CDEV_RAW=y
 CONFIG_ASPEED_KCS_IPMI_BMC=y
+CONFIG_MAGIC_SYSRQ=y