s390/configs: enable CONFIG_KFENCE in debug_defconfig

Signed-off-by: NSven Schnelle <svens@linux.ibm.com>
Signed-off-by: NHeiko Carstens <hca@linux.ibm.com>

arch/s390/configs/debug_defconfig

@@ -804,6 +804,7 @@ CONFIG_DEBUG_VM_PGFLAGS=y
 CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
 CONFIG_DEBUG_PER_CPU_MAPS=y
+CONFIG_KFENCE=y
 CONFIG_DEBUG_SHIRQ=y
 CONFIG_PANIC_ON_OOPS=y
 CONFIG_DETECT_HUNG_TASK=y