[Feature] add GA346 baseline version

Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/arch/powerpc/boot/fsl-soc.h b/src/kernel/linux/v4.19/arch/powerpc/boot/fsl-soc.h
new file mode 100644
index 0000000..00b2cb8
--- /dev/null
+++ b/src/kernel/linux/v4.19/arch/powerpc/boot/fsl-soc.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _PPC_BOOT_FSL_SOC_H_
+#define _PPC_BOOT_FSL_SOC_H_
+
+#include "types.h"
+
+u32 *fsl_get_immr(void);
+
+#endif