[Feature] add GA346 baseline version

Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/arch/s390/boot/mem.S b/src/kernel/linux/v4.19/arch/s390/boot/mem.S
new file mode 100644
index 0000000..b334636
--- /dev/null
+++ b/src/kernel/linux/v4.19/arch/s390/boot/mem.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include "../lib/mem.S"