ima: Fix the IMA kernel feature

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
diff --git a/meta-security/meta-integrity/recipes-kernel/linux/linux_ima.inc b/meta-security/meta-integrity/recipes-kernel/linux/linux_ima.inc
index 3ab53e5..0b6f530 100644
--- a/meta-security/meta-integrity/recipes-kernel/linux/linux_ima.inc
+++ b/meta-security/meta-integrity/recipes-kernel/linux/linux_ima.inc
@@ -1,4 +1,12 @@
-KERNEL_FEATURES:append = " ${@bb.utils.contains("DISTRO_FEATURES", "ima", " features/ima/ima.scc", "" ,d)}"
+FILESEXTRAPATHS:append := "${THISDIR}/linux:"
+
+SRC_URI += " \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'ima', 'file://ima.scc', '', d)} \
+"
+
+do_configure() {
+    sed -i "s|^CONFIG_SYSTEM_TRUSTED_KEYS=.*|CONFIG_SYSTEM_TRUSTED_KEYS=\"${IMA_EVM_ROOT_CA}\"|" .config
+}
 
 KERNEL_FEATURES:append = " ${@bb.utils.contains('DISTRO_FEATURES', 'modsign', ' features/ima/modsign.scc', '', d)}"