meta-integrity: Convert to new override syntax

Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-integrity/classes/kernel-modsign.bbclass

@@ -15,7 +15,7 @@ MODSIGN_X509 ?= "${MODSIGN_KEY_DIR}/x509_modsign.crt"
 # If this class is enabled, disable stripping signatures from modules
 INHIBIT_PACKAGE_STRIP = "1"
 
-kernel_do_configure_prepend() {
+kernel_do_configure:prepend() {
     if [ -f "${MODSIGN_PRIVKEY}" -a -f "${MODSIGN_X509}" ]; then
         cat "${MODSIGN_PRIVKEY}" "${MODSIGN_X509}" \
             > "${B}/modsign_key.pem"
@@ -24,6 +24,6 @@ kernel_do_configure_prepend() {
     fi
 }
 
-do_shared_workdir_append() {
+do_shared_workdir:append() {
     cp modsign_key.pem $kerneldir/
 }