[Feature] add GA346 baseline version

Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/arch/mips/lasat/prom.h b/src/kernel/linux/v4.19/arch/mips/lasat/prom.h
new file mode 100644
index 0000000..3d1df85
--- /dev/null
+++ b/src/kernel/linux/v4.19/arch/mips/lasat/prom.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PROM_H
+#define __PROM_H
+
+extern void (*prom_display)(const char *string, int pos, int clear);
+extern void (*prom_monitor)(void);
+
+#endif /* __PROM_H */