rcar_gen3: drivers: staging

 - ddr
 - pfc [pin function controller]
 - qos [bandwidth]

checkpatch.pl is generating too many errors.
diff --git a/drivers/staging/renesas/rcar/ddr/boot_init_dram.h b/drivers/staging/renesas/rcar/ddr/boot_init_dram.h
new file mode 100644
index 0000000..7ec2930
--- /dev/null
+++ b/drivers/staging/renesas/rcar/ddr/boot_init_dram.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef	__BOOT_INIT_DRAM_
+#define	__BOOT_INIT_DRAM_
+
+extern int32_t rcar_dram_init(void);
+
+#define INITDRAM_OK (0)
+#define INITDRAM_NG (0xffffffff)
+#define INITDRAM_ERR_I (0xffffffff)
+#define INITDRAM_ERR_O (0xfffffffe)
+#define INITDRAM_ERR_T (0xfffffff0)
+
+#endif